20683698144 has 24 divisors (see below), whose sum is σ = 54294707880. Its totient is φ = 6894566016.

The previous prime is 20683698137. The next prime is 20683698149. The reversal of 20683698144 is 44189638602.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20683698149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107727499 + ... + 107727690.

It is an arithmetic number, because the mean of its divisors is an integer number (2262279495).

Almost surely, 2^20683698144 is an apocalyptic number.

20683698144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20683698144 is an abundant number, since it is smaller than the sum of its proper divisors (33611009736).

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

20683698144 is a wasteful number, since it uses less digits than its factorization.

20683698144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215455202 (or 215455194 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 51.

The spelling of 20683698144 in words is "twenty billion, six hundred eighty-three million, six hundred ninety-eight thousand, one hundred forty-four".