20545457023 has 8 divisors (see below), whose sum is σ = 25286716448. Its totient is φ = 16255746144.

The previous prime is 20545457021. The next prime is 20545457029. The reversal of 20545457023 is 32075454502.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20545457023 - 2¹ = 20545457021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20545457021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112887036 + ... + 112887217.

It is an arithmetic number, because the mean of its divisors is an integer number (3160839556).

Almost surely, 2^20545457023 is an apocalyptic number.

20545457023 is a deficient number, since it is larger than the sum of its proper divisors (4741259425).

20545457023 is a wasteful number, since it uses less digits than its factorization.

20545457023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225774273.

The product of its (nonzero) digits is 168000, while the sum is 37.

The spelling of 20545457023 in words is "twenty billion, five hundred forty-five million, four hundred fifty-seven thousand, twenty-three".