20259142955 has 4 divisors (see below), whose sum is σ = 24310971552. Its totient is φ = 16207314360.

The previous prime is 20259142919. The next prime is 20259142961. The reversal of 20259142955 is 55924195202.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55924195202 = 2 ⋅27962097601.

It is not a de Polignac number, because 20259142955 - 2⁸ = 20259142699 is a prime.

It is a super-2 number, since 2×20259142955² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2025914291 + ... + 2025914300.

It is an arithmetic number, because the mean of its divisors is an integer number (6077742888).

Almost surely, 2^20259142955 is an apocalyptic number.

20259142955 is a deficient number, since it is larger than the sum of its proper divisors (4051828597).

20259142955 is an equidigital number, since it uses as much as digits as its factorization.

20259142955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4051828596.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 20259142955 in words is "twenty billion, two hundred fifty-nine million, one hundred forty-two thousand, nine hundred fifty-five".