20487623 has 8 divisors (see below), whose sum is σ = 22344000. Its totient is φ = 18671328.

The previous prime is 20487619. The next prime is 20487631. The reversal of 20487623 is 32678402.

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

It is not a de Polignac number, because 20487623 - 2² = 20487619 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 20487623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487613) 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, 8948 + ... + 11001.

It is an arithmetic number, because the mean of its divisors is an integer number (2793000).

Almost surely, 2^20487623 is an apocalyptic number.

20487623 is a deficient number, since it is larger than the sum of its proper divisors (1856377).

20487623 is a wasteful number, since it uses less digits than its factorization.

20487623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20041.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 20487623 is about 4526.3255517031. The cubic root of 20487623 is about 273.6300929518.

The spelling of 20487623 in words is "twenty million, four hundred eighty-seven thousand, six hundred twenty-three".