20151656407 has 2 divisors, whose sum is σ = 20151656408. Its totient is φ = 20151656406.

The previous prime is 20151656377. The next prime is 20151656411. The reversal of 20151656407 is 70465615102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20151656407 - 2⁷ = 20151656279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20151656467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10075828203 + 10075828204.

It is an arithmetic number, because the mean of its divisors is an integer number (10075828204).

Almost surely, 2^20151656407 is an apocalyptic number.

20151656407 is a deficient number, since it is larger than the sum of its proper divisors (1).

20151656407 is an equidigital number, since it uses as much as digits as its factorization.

20151656407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 20151656407 in words is "twenty billion, one hundred fifty-one million, six hundred fifty-six thousand, four hundred seven".