20984933057 has 8 divisors (see below), whose sum is σ = 23425042080. Its totient is φ = 18633555360.

The previous prime is 20984933033. The next prime is 20984933063. The reversal of 20984933057 is 75033948902.

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 20984933057 - 2¹² = 20984928961 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20984932996 and 20984933014.

It is not an unprimeable number, because it can be changed into a prime (20984933087) 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, 22182332 + ... + 22183277.

It is an arithmetic number, because the mean of its divisors is an integer number (2928130260).

Almost surely, 2^20984933057 is an apocalyptic number.

It is an amenable number.

20984933057 is a deficient number, since it is larger than the sum of its proper divisors (2440109023).

20984933057 is a wasteful number, since it uses less digits than its factorization.

20984933057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44365663.

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 20984933057 in words is "twenty billion, nine hundred eighty-four million, nine hundred thirty-three thousand, fifty-seven".