20275612251 has 4 divisors (see below), whose sum is σ = 27034149672. Its totient is φ = 13517074832.

The previous prime is 20275612243. The next prime is 20275612297. The reversal of 20275612251 is 15221657202.

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 20275612251 - 2³ = 20275612243 is a prime.

It is a super-2 number, since 2×20275612251² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20275619251) 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, 3379268706 + ... + 3379268711.

It is an arithmetic number, because the mean of its divisors is an integer number (6758537418).

Almost surely, 2^20275612251 is an apocalyptic number.

20275612251 is a deficient number, since it is larger than the sum of its proper divisors (6758537421).

20275612251 is an equidigital number, since it uses as much as digits as its factorization.

20275612251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6758537420.

The product of its (nonzero) digits is 16800, while the sum is 33.

The spelling of 20275612251 in words is "twenty billion, two hundred seventy-five million, six hundred twelve thousand, two hundred fifty-one".