921845383470 has 128 divisors (see below), whose sum is σ = 2689836802560. Its totient is φ = 222802272000.

The previous prime is 921845383457. The next prime is 921845383499. The reversal of 921845383470 is 74383548129.

It is a happy number.

921845383470 is a `hidden beast` number, since 9 + 2 + 1 + 8 + 4 + 538 + 34 + 70 = 666.

It is a super-2 number, since 2×921845383470² (a number of 25 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 514210 + ... + 1451930.

It is an arithmetic number, because the mean of its divisors is an integer number (21014350020).

Almost surely, 2^921845383470 is an apocalyptic number.

921845383470 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 921845383470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1344918401280).

921845383470 is an abundant number, since it is smaller than the sum of its proper divisors (1767991419090).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

921845383470 is a wasteful number, since it uses less digits than its factorization.

921845383470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938079 (or 938073 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 921845383470 in words is "nine hundred twenty-one billion, eight hundred forty-five million, three hundred eighty-three thousand, four hundred seventy".