20748309925 has 24 divisors (see below), whose sum is σ = 29428509312. Its totient is φ = 14215224000.

The previous prime is 20748309893. The next prime is 20748309929. The reversal of 20748309925 is 52990384702.

It is not a de Polignac number, because 20748309925 - 2⁵ = 20748309893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20748309929) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 156480 + ... + 256870.

It is an arithmetic number, because the mean of its divisors is an integer number (1226187888).

Almost surely, 2^20748309925 is an apocalyptic number.

20748309925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20748309925 is a deficient number, since it is larger than the sum of its proper divisors (8680199387).

20748309925 is a wasteful number, since it uses less digits than its factorization.

20748309925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101589 (or 101584 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 20748309925 in words is "twenty billion, seven hundred forty-eight million, three hundred nine thousand, nine hundred twenty-five".