20606004400 has 30 divisors (see below), whose sum is σ = 49505926532. Its totient is φ = 8242401600.

The previous prime is 20606004343. The next prime is 20606004401. The reversal of 20606004400 is 440060602.

It is not an unprimeable number, because it can be changed into a prime (20606004401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25757106 + ... + 25757905.

Almost surely, 2^20606004400 is an apocalyptic number.

20606004400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20606004400 is an abundant number, since it is smaller than the sum of its proper divisors (28899922132).

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

20606004400 is a wasteful number, since it uses less digits than its factorization.

20606004400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51515029 (or 51515018 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The spelling of 20606004400 in words is "twenty billion, six hundred six million, four thousand, four hundred".