20848645251 has 96 divisors (see below), whose sum is σ = 36552821760. Its totient is φ = 11194267392.

The previous prime is 20848645243. The next prime is 20848645267. The reversal of 20848645251 is 15254684802.

20848645251 is a `hidden beast` number, since 20 + 8 + 48 + 64 + 525 + 1 = 666.

It is not a de Polignac number, because 20848645251 - 2³ = 20848645243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20848645197 and 20848645206.

It is not an unprimeable number, because it can be changed into a prime (20848645201) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 27540765 + ... + 27541521.

It is an arithmetic number, because the mean of its divisors is an integer number (380758560).

Almost surely, 2^20848645251 is an apocalyptic number.

20848645251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20848645251 is a deficient number, since it is larger than the sum of its proper divisors (15704176509).

20848645251 is a wasteful number, since it uses less digits than its factorization.

20848645251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105 (or 1102 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 20848645251 in words is "twenty billion, eight hundred forty-eight million, six hundred forty-five thousand, two hundred fifty-one".