23935493521 has 9 divisors (see below), whose sum is σ = 24140042299. Its totient is φ = 23732667400.

The previous prime is 23935493489. The next prime is 23935493557. The reversal of 23935493521 is 12539453932.

The square root of 23935493521 is 154711.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 21951681921 + 1983811600 = 148161^2 + 44540^2 .

It is not a de Polignac number, because 23935493521 - 2⁵ = 23935493489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23935491521) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20266551 + ... + 20267731.

Almost surely, 2^23935493521 is an apocalyptic number.

23935493521 is the 154711-st square number.

23935493521 is the 77356-th centered octagonal number.

It is an amenable number.

23935493521 is a deficient number, since it is larger than the sum of its proper divisors (204548778).

23935493521 is an frugal number, since it uses more digits than its factorization.

23935493521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624 (or 1312 counting only the distinct ones).

The product of its digits is 874800, while the sum is 46.

The spelling of 23935493521 in words is "twenty-three billion, nine hundred thirty-five million, four hundred ninety-three thousand, five hundred twenty-one".