21523010473737 has 24 divisors (see below), whose sum is σ = 31213625686880. Its totient is φ = 14291144461440.

The previous prime is 21523010473721. The next prime is 21523010473751. The reversal of 21523010473737 is 73737401032512.

21523010473737 is a `hidden beast` number, since 2 + 1 + 5 + 230 + 1 + 0 + 47 + 373 + 7 = 666.

It is not a de Polignac number, because 21523010473737 - 2⁴ = 21523010473721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21523010473692 and 21523010473701.

It is not an unprimeable number, because it can be changed into a prime (21523010473717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 574423 + ... + 6586044.

Almost surely, 2^{21523010473737} is an apocalyptic number.

It is an amenable number.

21523010473737 is a deficient number, since it is larger than the sum of its proper divisors (9690615213143).

21523010473737 is a wasteful number, since it uses less digits than its factorization.

21523010473737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7161813 (or 7161810 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 45.

The spelling of 21523010473737 in words is "twenty-one trillion, five hundred twenty-three billion, ten million, four hundred seventy-three thousand, seven hundred thirty-seven".