20105425923 has 32 divisors (see below), whose sum is σ = 29950124544. Its totient is φ = 11894400000.

The previous prime is 20105425903. The next prime is 20105425933. The reversal of 20105425923 is 32952450102.

It is not a de Polignac number, because 20105425923 - 2⁵ = 20105425891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (20105425903) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194163 + ... + 279123.

It is an arithmetic number, because the mean of its divisors is an integer number (935941392).

Almost surely, 2^20105425923 is an apocalyptic number.

20105425923 is a deficient number, since it is larger than the sum of its proper divisors (9844698621).

20105425923 is a wasteful number, since it uses less digits than its factorization.

20105425923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85147.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 20105425923 in words is "twenty billion, one hundred five million, four hundred twenty-five thousand, nine hundred twenty-three".