20256723015 has 16 divisors (see below), whose sum is σ = 33201264096. Its totient is φ = 10540083200.

The previous prime is 20256722999. The next prime is 20256723017. The reversal of 20256723015 is 51032765202.

It is not a de Polignac number, because 20256723015 - 2⁴ = 20256722999 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20256723017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16468266 + ... + 16469495.

It is an arithmetic number, because the mean of its divisors is an integer number (2075079006).

Almost surely, 2^20256723015 is an apocalyptic number.

20256723015 is a deficient number, since it is larger than the sum of its proper divisors (12944541081).

20256723015 is a wasteful number, since it uses less digits than its factorization.

20256723015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32937810.

The product of its (nonzero) digits is 25200, while the sum is 33.

The spelling of 20256723015 in words is "twenty billion, two hundred fifty-six million, seven hundred twenty-three thousand, fifteen".