23626021157 has 2 divisors, whose sum is σ = 23626021158. Its totient is φ = 23626021156.

The previous prime is 23626021151. The next prime is 23626021171. The reversal of 23626021157 is 75112062632.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23016227521 + 609793636 = 151711^2 + 24694^2 .

It is a cyclic number.

It is not a de Polignac number, because 23626021157 - 2⁴ = 23626021141 is a prime.

It is a super-2 number, since 2×23626021157² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23626021151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11813010578 + 11813010579.

It is an arithmetic number, because the mean of its divisors is an integer number (11813010579).

Almost surely, 2^23626021157 is an apocalyptic number.

It is an amenable number.

23626021157 is a deficient number, since it is larger than the sum of its proper divisors (1).

23626021157 is an equidigital number, since it uses as much as digits as its factorization.

23626021157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

Adding to 23626021157 its reverse (75112062632), we get a palindrome (98738083789).

The spelling of 23626021157 in words is "twenty-three billion, six hundred twenty-six million, twenty-one thousand, one hundred fifty-seven".