20475247276531 has 4 divisors (see below), whose sum is σ = 20475295216200. Its totient is φ = 20475199336864.

The previous prime is 20475247276513. The next prime is 20475247276537. The reversal of 20475247276531 is 13567274257402.

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 20475247276531 - 2⁹ = 20475247276019 is a prime.

It is a super-2 number, since 2×20475247276531² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20475247276537) 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, 23323366 + ... + 24185323.

It is an arithmetic number, because the mean of its divisors is an integer number (5118823804050).

Almost surely, 2^{20475247276531} is an apocalyptic number.

20475247276531 is a deficient number, since it is larger than the sum of its proper divisors (47939669).

20475247276531 is an equidigital number, since it uses as much as digits as its factorization.

20475247276531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47939668.

The product of its (nonzero) digits is 19756800, while the sum is 55.

The spelling of 20475247276531 in words is "twenty trillion, four hundred seventy-five billion, two hundred forty-seven million, two hundred seventy-six thousand, five hundred thirty-one".