23921016 has 48 divisors (see below), whose sum is σ = 69569640. Its totient is φ = 6834240.

The previous prime is 23921011. The next prime is 23921017. The reversal of 23921016 is 61012932.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23921011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8995 + ... + 11346.

Almost surely, 2^23921016 is an apocalyptic number.

It is an amenable number.

23921016 is an abundant number, since it is smaller than the sum of its proper divisors (45648624).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23921016 is a wasteful number, since it uses less digits than its factorization.

23921016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20364 (or 20353 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 23921016 is about 4890.9115714762. The cubic root of 23921016 is about 288.1331367465.

Adding to 23921016 its reverse (61012932), we get a palindrome (84933948).

The spelling of 23921016 in words is "twenty-three million, nine hundred twenty-one thousand, sixteen".