21703552156 has 48 divisors (see below), whose sum is σ = 44791262208. Its totient is φ = 9071697600.

The previous prime is 21703552147. The next prime is 21703552177. The reversal of 21703552156 is 65125530712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78301 + ... + 222571.

It is an arithmetic number, because the mean of its divisors is an integer number (933151296).

Almost surely, 2^21703552156 is an apocalyptic number.

21703552156 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21703552156 is an abundant number, since it is smaller than the sum of its proper divisors (23087710052).

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

21703552156 is a wasteful number, since it uses less digits than its factorization.

21703552156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144562 (or 144560 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 21703552156 in words is "twenty-one billion, seven hundred three million, five hundred fifty-two thousand, one hundred fifty-six".