20294421928 has 32 divisors (see below), whose sum is σ = 41766017760. Its totient is φ = 9168137280.

The previous prime is 20294421923. The next prime is 20294421929. The reversal of 20294421928 is 82912449202.

It is a super-2 number, since 2×20294421928² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20294421923) 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, 693075 + ... + 721762.

It is an arithmetic number, because the mean of its divisors is an integer number (1305188055).

Almost surely, 2^20294421928 is an apocalyptic number.

It is an amenable number.

20294421928 is an abundant number, since it is smaller than the sum of its proper divisors (21471595832).

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

20294421928 is a wasteful number, since it uses less digits than its factorization.

20294421928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415017 (or 1415013 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 43.

The spelling of 20294421928 in words is "twenty billion, two hundred ninety-four million, four hundred twenty-one thousand, nine hundred twenty-eight".