20356370460 has 144 divisors (see below), whose sum is σ = 62293795200. Its totient is φ = 5380566912.

The previous prime is 20356370449. The next prime is 20356370479. The reversal of 20356370460 is 6407365302.

20356370460 is a `hidden beast` number, since 20 + 3 + 563 + 70 + 4 + 6 + 0 = 666.

It is a super-2 number, since 2×20356370460² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12210547 + ... + 12212213.

It is an arithmetic number, because the mean of its divisors is an integer number (432595800).

Almost surely, 2^20356370460 is an apocalyptic number.

20356370460 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20356370460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31146897600).

20356370460 is an abundant number, since it is smaller than the sum of its proper divisors (41937424740).

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

20356370460 is a wasteful number, since it uses less digits than its factorization.

20356370460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2240 (or 2235 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The spelling of 20356370460 in words is "twenty billion, three hundred fifty-six million, three hundred seventy thousand, four hundred sixty".