20988701406 has 12 divisors (see below), whose sum is σ = 45475519752. Its totient is φ = 6996233796.

The previous prime is 20988701401. The next prime is 20988701407. The reversal of 20988701406 is 60410788902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988701401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 583019466 + ... + 583019501.

It is an arithmetic number, because the mean of its divisors is an integer number (3789626646).

Almost surely, 2^20988701406 is an apocalyptic number.

20988701406 is an abundant number, since it is smaller than the sum of its proper divisors (24486818346).

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

20988701406 is a wasteful number, since it uses less digits than its factorization.

20988701406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166038975 (or 1166038972 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 20988701406 in words is "twenty billion, nine hundred eighty-eight million, seven hundred one thousand, four hundred six".