23021428939 has 16 divisors (see below), whose sum is σ = 24899724288. Its totient is φ = 21230237952.

The previous prime is 23021428931. The next prime is 23021428973. The reversal of 23021428939 is 93982412032.

It is not a de Polignac number, because 23021428939 - 2³ = 23021428931 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23021428895 and 23021428904.

It is not an unprimeable number, because it can be changed into a prime (23021428931) by changing a digit.

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, 86502 + ... + 231355.

It is an arithmetic number, because the mean of its divisors is an integer number (1556232768).

Almost surely, 2^23021428939 is an apocalyptic number.

23021428939 is a deficient number, since it is larger than the sum of its proper divisors (1878295349).

23021428939 is a wasteful number, since it uses less digits than its factorization.

23021428939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317994.

The product of its (nonzero) digits is 186624, while the sum is 43.

The spelling of 23021428939 in words is "twenty-three billion, twenty-one million, four hundred twenty-eight thousand, nine hundred thirty-nine".