20965922064 has 100 divisors (see below), whose sum is σ = 60889667916. Its totient is φ = 6964662528.

The previous prime is 20965922063. The next prime is 20965922071. The reversal of 20965922064 is 46022956902.

It can be written as a sum of positive squares in 2 ways, for example, as 16983302400 + 3982619664 = 130320^2 + 63108^2 .

It is a super-3 number, since 3×20965922064³ (a number of 32 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (20965922063) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 352122 + ... + 407334.

Almost surely, 2^20965922064 is an apocalyptic number.

20965922064 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20965922064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30444833958).

20965922064 is an abundant number, since it is smaller than the sum of its proper divisors (39923745852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20965922064 is a wasteful number, since it uses less digits than its factorization.

20965922064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55526 (or 55511 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 20965922064 in words is "twenty billion, nine hundred sixty-five million, nine hundred twenty-two thousand, sixty-four".