20878489944 has 96 divisors (see below), whose sum is σ = 62541526320. Its totient is φ = 6250514688.

The previous prime is 20878489943. The next prime is 20878489963. The reversal of 20878489944 is 44998487802.

It is a super-2 number, since 2×20878489944² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20878489943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 266802 + ... + 336065.

Almost surely, 2^20878489944 is an apocalyptic number.

20878489944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20878489944 is an abundant number, since it is smaller than the sum of its proper divisors (41663036376).

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

20878489944 is a wasteful number, since it uses less digits than its factorization.

20878489944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602929 (or 602922 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 63.

The spelling of 20878489944 in words is "twenty billion, eight hundred seventy-eight million, four hundred eighty-nine thousand, nine hundred forty-four".