20529256953 has 4 divisors (see below), whose sum is σ = 27372342608. Its totient is φ = 13686171300.

The previous prime is 20529256949. The next prime is 20529256973. The reversal of 20529256953 is 35965292502.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 20529256953 - 2² = 20529256949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20529256973) 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, 3421542823 + ... + 3421542828.

It is an arithmetic number, because the mean of its divisors is an integer number (6843085652).

Almost surely, 2^20529256953 is an apocalyptic number.

It is an amenable number.

20529256953 is a deficient number, since it is larger than the sum of its proper divisors (6843085655).

20529256953 is an equidigital number, since it uses as much as digits as its factorization.

20529256953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6843085654.

The product of its (nonzero) digits is 1458000, while the sum is 48.

The spelling of 20529256953 in words is "twenty billion, five hundred twenty-nine million, two hundred fifty-six thousand, nine hundred fifty-three".