20408269488 has 80 divisors (see below), whose sum is σ = 52945539840. Its totient is φ = 6773907712.

The previous prime is 20408269447. The next prime is 20408269489. The reversal of 20408269488 is 88496280402.

It is a self number, because there is not a number n which added to its sum of digits gives 20408269488.

It is not an unprimeable number, because it can be changed into a prime (20408269489) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16686445 + ... + 16687667.

It is an arithmetic number, because the mean of its divisors is an integer number (661819248).

Almost surely, 2^20408269488 is an apocalyptic number.

It is an amenable number.

20408269488 is an abundant number, since it is smaller than the sum of its proper divisors (32537270352).

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

20408269488 is a wasteful number, since it uses less digits than its factorization.

20408269488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426 (or 2420 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 51.

The spelling of 20408269488 in words is "twenty billion, four hundred eight million, two hundred sixty-nine thousand, four hundred eighty-eight".