20622651 has 16 divisors (see below), whose sum is σ = 32792064. Its totient is φ = 11271744.

The previous prime is 20622647. The next prime is 20622661. The reversal of 20622651 is 15622602.

It is not a de Polignac number, because 20622651 - 2² = 20622647 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20622601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20866 + ... + 21831.

It is an arithmetic number, because the mean of its divisors is an integer number (2049504).

Almost surely, 2^20622651 is an apocalyptic number.

20622651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

20622651 is a deficient number, since it is larger than the sum of its proper divisors (12169413).

20622651 is a wasteful number, since it uses less digits than its factorization.

20622651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42730.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20622651 is about 4541.2169073939. The cubic root of 20622651 is about 274.2299160663.

The spelling of 20622651 in words is "twenty million, six hundred twenty-two thousand, six hundred fifty-one".