18888761490 has 32 divisors (see below), whose sum is σ = 45336848256. Its totient is φ = 5036578560.

The previous prime is 18888761483. The next prime is 18888761491. The reversal of 18888761490 is 9416788881.

It is a happy number.

It is a super-2 number, since 2×18888761490² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18888761491) 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, 519754 + ... + 554906.

It is an arithmetic number, because the mean of its divisors is an integer number (1416776508).

Almost surely, 2^18888761490 is an apocalyptic number.

18888761490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18888761490 is an abundant number, since it is smaller than the sum of its proper divisors (26448086766).

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

18888761490 is a wasteful number, since it uses less digits than its factorization.

18888761490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53074.

The product of its (nonzero) digits is 6193152, while the sum is 60.

The spelling of 18888761490 in words is "eighteen billion, eight hundred eighty-eight million, seven hundred sixty-one thousand, four hundred ninety".