20268651 has 16 divisors (see below), whose sum is σ = 30108960. Its totient is φ = 12042240.

The previous prime is 20268643. The next prime is 20268671. The reversal of 20268651 is 15686202.

It is not a de Polignac number, because 20268651 - 2³ = 20268643 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20268601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7830 + ... + 10091.

It is an arithmetic number, because the mean of its divisors is an integer number (1881810).

Almost surely, 2^20268651 is an apocalyptic number.

20268651 is a deficient number, since it is larger than the sum of its proper divisors (9840309).

20268651 is a wasteful number, since it uses less digits than its factorization.

20268651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17966.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 20268651 is about 4502.0718563790. The cubic root of 20268651 is about 272.6517450150.

The spelling of 20268651 in words is "twenty million, two hundred sixty-eight thousand, six hundred fifty-one".