20158382623 has 4 divisors (see below), whose sum is σ = 20305524240. Its totient is φ = 20011241008.

The previous prime is 20158382611. The next prime is 20158382627. The reversal of 20158382623 is 32628385102.

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 20158382623 - 2²⁹ = 19621511711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158382627) 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, 73570603 + ... + 73570876.

It is an arithmetic number, because the mean of its divisors is an integer number (5076381060).

Almost surely, 2^20158382623 is an apocalyptic number.

20158382623 is a deficient number, since it is larger than the sum of its proper divisors (147141617).

20158382623 is a wasteful number, since it uses less digits than its factorization.

20158382623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147141616.

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 20158382623 in words is "twenty billion, one hundred fifty-eight million, three hundred eighty-two thousand, six hundred twenty-three".