20655401360 has 40 divisors (see below), whose sum is σ = 52389611136. Its totient is φ = 7511054720.

The previous prime is 20655401359. The next prime is 20655401363. The reversal of 20655401360 is 6310455602.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (20655401363) 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, 11735144 + ... + 11736903.

Almost surely, 2^20655401360 is an apocalyptic number.

20655401360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20655401360 is an abundant number, since it is smaller than the sum of its proper divisors (31734209776).

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

20655401360 is a wasteful number, since it uses less digits than its factorization.

20655401360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23472071 (or 23472065 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 20655401360 its reverse (6310455602), we get a palindrome (26965856962).

The spelling of 20655401360 in words is "twenty billion, six hundred fifty-five million, four hundred one thousand, three hundred sixty".