20418890488 has 16 divisors (see below), whose sum is σ = 39605607000. Its totient is φ = 9857395296.

The previous prime is 20418890473. The next prime is 20418890491. The reversal of 20418890488 is 88409881402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44005998 + ... + 44006461.

Almost surely, 2^20418890488 is an apocalyptic number.

It is an amenable number.

20418890488 is a deficient number, since it is larger than the sum of its proper divisors (19186716512).

20418890488 is a wasteful number, since it uses less digits than its factorization.

20418890488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88012494 (or 88012490 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 52.

The spelling of 20418890488 in words is "twenty billion, four hundred eighteen million, eight hundred ninety thousand, four hundred eighty-eight".