21746285708 has 48 divisors (see below), whose sum is σ = 43676236800. Its totient is φ = 9280562880.

The previous prime is 21746285657. The next prime is 21746285713. The reversal of 21746285708 is 80758264712.

It is a super-2 number, since 2×21746285708² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10664153 + ... + 10666191.

It is an arithmetic number, because the mean of its divisors is an integer number (909921600).

Almost surely, 2^21746285708 is an apocalyptic number.

21746285708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21746285708 is an abundant number, since it is smaller than the sum of its proper divisors (21929951092).

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

21746285708 is a wasteful number, since it uses less digits than its factorization.

21746285708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3470 (or 3468 counting only the distinct ones).

The product of its (nonzero) digits is 1505280, while the sum is 50.

The spelling of 21746285708 in words is "twenty-one billion, seven hundred forty-six million, two hundred eighty-five thousand, seven hundred eight".