20005551023 has 16 divisors (see below), whose sum is σ = 21927672000. Its totient is φ = 18167127552.

The previous prime is 20005551011. The next prime is 20005551037. The reversal of 20005551023 is 32015550002.

It is a cyclic number.

It is not a de Polignac number, because 20005551023 - 2²⁴ = 19988773807 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20005551023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20005551323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 755573 + ... + 781601.

It is an arithmetic number, because the mean of its divisors is an integer number (1370479500).

Almost surely, 2^20005551023 is an apocalyptic number.

20005551023 is a deficient number, since it is larger than the sum of its proper divisors (1922120977).

20005551023 is a wasteful number, since it uses less digits than its factorization.

20005551023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27634.

The product of its (nonzero) digits is 1500, while the sum is 23.

The spelling of 20005551023 in words is "twenty billion, five million, five hundred fifty-one thousand, twenty-three".