20654037625 has 16 divisors (see below), whose sum is σ = 27759028752. Its totient is φ = 15252211200.

The previous prime is 20654037589. The next prime is 20654037629. The reversal of 20654037625 is 52673045602.

It can be written as a sum of positive squares in 8 ways, for example, as 14972948496 + 5681089129 = 122364^2 + 75373^2 .

It is not a de Polignac number, because 20654037625 - 2¹⁹ = 20653513337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20654037629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6353464 + ... + 6356713.

It is an arithmetic number, because the mean of its divisors is an integer number (1734939297).

Almost surely, 2^20654037625 is an apocalyptic number.

20654037625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20654037625 is a deficient number, since it is larger than the sum of its proper divisors (7104991127).

20654037625 is a wasteful number, since it uses less digits than its factorization.

20654037625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12710205 (or 12710195 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 40.

The spelling of 20654037625 in words is "twenty billion, six hundred fifty-four million, thirty-seven thousand, six hundred twenty-five".