23921029 has 16 divisors (see below), whose sum is σ = 27016704. Its totient is φ = 20991600.

The previous prime is 23921017. The next prime is 23921047. The reversal of 23921029 is 92012932.

It is a cyclic number.

It is not a de Polignac number, because 23921029 - 2²¹ = 21823877 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23920988 and 23921006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23921059) 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, 48474 + ... + 48964.

It is an arithmetic number, because the mean of its divisors is an integer number (1688544).

Almost surely, 2^23921029 is an apocalyptic number.

It is an amenable number.

23921029 is a deficient number, since it is larger than the sum of its proper divisors (3095675).

23921029 is a wasteful number, since it uses less digits than its factorization.

23921029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 23921029 is about 4890.9129004716. The cubic root of 23921029 is about 288.1331889423.

The spelling of 23921029 in words is "twenty-three million, nine hundred twenty-one thousand, twenty-nine".