20928412080 has 120 divisors (see below), whose sum is σ = 73340493408. Its totient is φ = 5338257408.

The previous prime is 20928412079. The next prime is 20928412093. The reversal of 20928412080 is 8021482902.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 615337 + ... + 648456.

Almost surely, 2^20928412080 is an apocalyptic number.

20928412080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20928412080 is an abundant number, since it is smaller than the sum of its proper divisors (52412081328).

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

20928412080 is a wasteful number, since it uses less digits than its factorization.

20928412080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263835 (or 1263826 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

Adding to 20928412080 its reverse (8021482902), we get a palindrome (28949894982).

The spelling of 20928412080 in words is "twenty billion, nine hundred twenty-eight million, four hundred twelve thousand, eighty".