20884535957 has 8 divisors (see below), whose sum is σ = 21985440000. Its totient is φ = 19783803744.

The previous prime is 20884535951. The next prime is 20884536017. The reversal of 20884535957 is 75953548802.

It is a happy number.

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 20884535957 - 2²⁰ = 20883487381 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 (20884535951) 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, 262169 + ... + 332417.

It is an arithmetic number, because the mean of its divisors is an integer number (2748180000).

Almost surely, 2^20884535957 is an apocalyptic number.

It is an amenable number.

20884535957 is a deficient number, since it is larger than the sum of its proper divisors (1100904043).

20884535957 is a wasteful number, since it uses less digits than its factorization.

20884535957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85915.

The product of its (nonzero) digits is 12096000, while the sum is 56.

The spelling of 20884535957 in words is "twenty billion, eight hundred eighty-four million, five hundred thirty-five thousand, nine hundred fifty-seven".