20940479028 has 72 divisors (see below), whose sum is σ = 64053243072. Its totient is φ = 5631052032.

The previous prime is 20940479023. The next prime is 20940479033. The reversal of 20940479028 is 82097404902.

It is an interprime number because it is at equal distance from previous prime (20940479023) and next prime (20940479033).

It is a super-3 number, since 3×20940479028³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20940479023) 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, 2439750 + ... + 2448317.

It is an arithmetic number, because the mean of its divisors is an integer number (889628376).

Almost surely, 2^20940479028 is an apocalyptic number.

20940479028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20940479028 is an abundant number, since it is smaller than the sum of its proper divisors (43112764044).

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

20940479028 is a wasteful number, since it uses less digits than its factorization.

20940479028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888101 (or 4888096 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 20940479028 in words is "twenty billion, nine hundred forty million, four hundred seventy-nine thousand, twenty-eight".