21960830355 has 32 divisors (see below), whose sum is σ = 36030044160. Its totient is φ = 11416016640.

The previous prime is 21960830347. The next prime is 21960830357. The reversal of 21960830355 is 55303806912.

It is not a de Polignac number, because 21960830355 - 2³ = 21960830347 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21960830357) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 273415 + ... + 344495.

It is an arithmetic number, because the mean of its divisors is an integer number (1125938880).

Almost surely, 2^21960830355 is an apocalyptic number.

21960830355 is a deficient number, since it is larger than the sum of its proper divisors (14069213805).

21960830355 is a wasteful number, since it uses less digits than its factorization.

21960830355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71611.

The product of its (nonzero) digits is 194400, while the sum is 42.

The spelling of 21960830355 in words is "twenty-one billion, nine hundred sixty million, eight hundred thirty thousand, three hundred fifty-five".