20654940940 has 24 divisors (see below), whose sum is σ = 43544162592. Its totient is φ = 8229826560.

The previous prime is 20654940937. The next prime is 20654940941. The reversal of 20654940940 is 4904945602.

It is not an unprimeable number, because it can be changed into a prime (20654940941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2004096 + ... + 2014375.

It is an arithmetic number, because the mean of its divisors is an integer number (1814340108).

Almost surely, 2^20654940940 is an apocalyptic number.

20654940940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20654940940 is an abundant number, since it is smaller than the sum of its proper divisors (22889221652).

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

20654940940 is a wasteful number, since it uses less digits than its factorization.

20654940940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4018737 (or 4018735 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 20654940940 in words is "twenty billion, six hundred fifty-four million, nine hundred forty thousand, nine hundred forty".