20408636583973 has 8 divisors (see below), whose sum is σ = 22264046516736. Its totient is φ = 18553239873600.

The previous prime is 20408636583961. The next prime is 20408636583991. The reversal of 20408636583973 is 37938563680402.

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 20408636583973 - 2³⁷ = 20271197630501 is a prime.

It is a super-2 number, since 2×20408636583973² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20408636583953) 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, 71740 + ... + 6389242.

It is an arithmetic number, because the mean of its divisors is an integer number (2783005814592).

Almost surely, 2^{20408636583973} is an apocalyptic number.

It is an amenable number.

20408636583973 is a deficient number, since it is larger than the sum of its proper divisors (1855409932763).

20408636583973 is a wasteful number, since it uses less digits than its factorization.

20408636583973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6611195.

The product of its (nonzero) digits is 156764160, while the sum is 64.

The spelling of 20408636583973 in words is "twenty trillion, four hundred eight billion, six hundred thirty-six million, five hundred eighty-three thousand, nine hundred seventy-three".