20012809408 has 28 divisors (see below), whose sum is σ = 39718429072. Its totient is φ = 10005016320.

The previous prime is 20012809391. The next prime is 20012809429. The reversal of 20012809408 is 80490821002.

It is a super-3 number, since 3×20012809408³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 566998 + ... + 601258.

It is an arithmetic number, because the mean of its divisors is an integer number (1418515324).

Almost surely, 2^20012809408 is an apocalyptic number.

It is an amenable number.

20012809408 is a deficient number, since it is larger than the sum of its proper divisors (19705619664).

20012809408 is an equidigital number, since it uses as much as digits as its factorization.

20012809408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43400 (or 43390 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 34.

The spelling of 20012809408 in words is "twenty billion, twelve million, eight hundred nine thousand, four hundred eight".