20401109712 has 60 divisors (see below), whose sum is σ = 59209404800. Its totient is φ = 6800368608.

The previous prime is 20401109699. The next prime is 20401109713. The reversal of 20401109712 is 21790110402.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401109713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2619712 + ... + 2627487.

Almost surely, 2^20401109712 is an apocalyptic number.

It is an amenable number.

20401109712 is an abundant number, since it is smaller than the sum of its proper divisors (38808295088).

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

20401109712 is an equidigital number, since it uses as much as digits as its factorization.

20401109712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5247222 (or 5247204 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The spelling of 20401109712 in words is "twenty billion, four hundred one million, one hundred nine thousand, seven hundred twelve".