21131623034 has 16 divisors (see below), whose sum is σ = 33535101600. Its totient is φ = 9958901904.

The previous prime is 21131623031. The next prime is 21131623043. The reversal of 21131623034 is 43032613112.

It is a junction number, because it is equal to n+sod(n) for n = 21131622994 and 21131623012.

It is not an unprimeable number, because it can be changed into a prime (21131623031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1403924 + ... + 1418895.

It is an arithmetic number, because the mean of its divisors is an integer number (2095943850).

Almost surely, 2^21131623034 is an apocalyptic number.

21131623034 is a deficient number, since it is larger than the sum of its proper divisors (12403478566).

21131623034 is a wasteful number, since it uses less digits than its factorization.

21131623034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2823037.

The product of its (nonzero) digits is 2592, while the sum is 26.

The spelling of 21131623034 in words is "twenty-one billion, one hundred thirty-one million, six hundred twenty-three thousand, thirty-four".