20256105151 has 4 divisors (see below), whose sum is σ = 20257044912. Its totient is φ = 20255165392.

The previous prime is 20256105131. The next prime is 20256105173. The reversal of 20256105151 is 15150165202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20256105151 - 2¹⁵ = 20256072383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20256105101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 436771 + ... + 480916.

It is an arithmetic number, because the mean of its divisors is an integer number (5064261228).

Almost surely, 2^20256105151 is an apocalyptic number.

20256105151 is a deficient number, since it is larger than the sum of its proper divisors (939761).

20256105151 is an equidigital number, since it uses as much as digits as its factorization.

20256105151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939760.

The product of its (nonzero) digits is 3000, while the sum is 28.

The spelling of 20256105151 in words is "twenty billion, two hundred fifty-six million, one hundred five thousand, one hundred fifty-one".