20151679 has 2 divisors, whose sum is σ = 20151680. Its totient is φ = 20151678.

The previous prime is 20151667. The next prime is 20151683. The reversal of 20151679 is 97615102.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20151679 - 2¹⁵ = 20118911 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20151679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20151619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075839 + 10075840.

It is an arithmetic number, because the mean of its divisors is an integer number (10075840).

Almost surely, 2^20151679 is an apocalyptic number.

20151679 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151679 is an equidigital number, since it uses as much as digits as its factorization.

20151679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 20151679 is about 4489.0621514967. The cubic root of 20151679 is about 272.1262344782.

The spelling of 20151679 in words is "twenty million, one hundred fifty-one thousand, six hundred seventy-nine".