20288651 has 2 divisors, whose sum is σ = 20288652. Its totient is φ = 20288650.

The previous prime is 20288641. The next prime is 20288657. The reversal of 20288651 is 15688202.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20288651 - 2¹⁴ = 20272267 is a prime.

It is not a weakly prime, because it can be changed into another prime (20288657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10144325 + 10144326.

It is an arithmetic number, because the mean of its divisors is an integer number (10144326).

Almost surely, 2^20288651 is an apocalyptic number.

20288651 is a deficient number, since it is larger than the sum of its proper divisors (1).

20288651 is an equidigital number, since it uses as much as digits as its factorization.

20288651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 20288651 is about 4504.2925082636. The cubic root of 20288651 is about 272.7413948277.

The spelling of 20288651 in words is "twenty million, two hundred eighty-eight thousand, six hundred fifty-one".