20653464420 has 36 divisors (see below), whose sum is σ = 62648842620. Its totient is φ = 5507590464.

The previous prime is 20653464389. The next prime is 20653464431. The reversal of 20653464420 is 2446435602.

20653464420 is a `hidden beast` number, since 2 + 0 + 6 + 5 + 3 + 4 + 644 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13750845696 + 6902618724 = 117264^2 + 83082^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57370555 + ... + 57370914.

Almost surely, 2^20653464420 is an apocalyptic number.

20653464420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20653464420 is an abundant number, since it is smaller than the sum of its proper divisors (41995378200).

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

20653464420 is a wasteful number, since it uses less digits than its factorization.

20653464420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114741484 (or 114741479 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 20653464420 in words is "twenty billion, six hundred fifty-three million, four hundred sixty-four thousand, four hundred twenty".