20968129331 has 16 divisors (see below), whose sum is σ = 22105300800. Its totient is φ = 19850168448.

The previous prime is 20968129327. The next prime is 20968129337. The reversal of 20968129331 is 13392186902.

It is a cyclic number.

It is not a de Polignac number, because 20968129331 - 2² = 20968129327 is a prime.

It is a super-2 number, since 2×20968129331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20968129337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2495285 + ... + 2503673.

It is an arithmetic number, because the mean of its divisors is an integer number (1381581300).

Almost surely, 2^20968129331 is an apocalyptic number.

20968129331 is a deficient number, since it is larger than the sum of its proper divisors (1137171469).

20968129331 is a wasteful number, since it uses less digits than its factorization.

20968129331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518.

The product of its (nonzero) digits is 139968, while the sum is 44.

The spelling of 20968129331 in words is "twenty billion, nine hundred sixty-eight million, one hundred twenty-nine thousand, three hundred thirty-one".