20717062440 has 64 divisors (see below), whose sum is σ = 62193519360. Its totient is φ = 5520787200.

The previous prime is 20717062391. The next prime is 20717062451. The reversal of 20717062440 is 4426071702.

It is a super-2 number, since 2×20717062440² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120390 + ... + 236490.

It is an arithmetic number, because the mean of its divisors is an integer number (971773740).

Almost surely, 2^20717062440 is an apocalyptic number.

20717062440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20717062440 is an abundant number, since it is smaller than the sum of its proper divisors (41476456920).

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

20717062440 is a wasteful number, since it uses less digits than its factorization.

20717062440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117602 (or 117598 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 33.

The spelling of 20717062440 in words is "twenty billion, seven hundred seventeen million, sixty-two thousand, four hundred forty".