23971535890 has 16 divisors (see below), whose sum is σ = 43962893208. Its totient is φ = 9407696896.

The previous prime is 23971535873. The next prime is 23971535909. The reversal of 23971535890 is 9853517932.

It can be written as a sum of positive squares in 4 ways, for example, as 14400240001 + 9571295889 = 120001^2 + 97833^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22614127 + ... + 22615186.

Almost surely, 2^23971535890 is an apocalyptic number.

23971535890 is a deficient number, since it is larger than the sum of its proper divisors (19991357318).

23971535890 is a wasteful number, since it uses less digits than its factorization.

23971535890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45229373.

The product of its (nonzero) digits is 2041200, while the sum is 52.

The spelling of 23971535890 in words is "twenty-three billion, nine hundred seventy-one million, five hundred thirty-five thousand, eight hundred ninety".