23210402004 has 18 divisors (see below), whose sum is σ = 58670738490. Its totient is φ = 7736800656.

The previous prime is 23210401993. The next prime is 23210402011. The reversal of 23210402004 is 40020401232.

It can be written as a sum of positive squares in only one way, i.e., 14860097604 + 8350304400 = 121902^2 + 91380^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×23210402004² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 322366659 + ... + 322366730.

Almost surely, 2^23210402004 is an apocalyptic number.

It is an amenable number.

23210402004 is an abundant number, since it is smaller than the sum of its proper divisors (35460336486).

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

23210402004 is a wasteful number, since it uses less digits than its factorization.

23210402004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644733399 (or 644733394 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

Adding to 23210402004 its reverse (40020401232), we get a palindrome (63230803236).

The spelling of 23210402004 in words is "twenty-three billion, two hundred ten million, four hundred two thousand, four".