18649357290 has 48 divisors (see below), whose sum is σ = 48555936000. Its totient is φ = 4966227936.

The previous prime is 18649357253. The next prime is 18649357303. The reversal of 18649357290 is 9275394681.

18649357290 is a `hidden beast` number, since 1 + 8 + 64 + 9 + 3 + 572 + 9 + 0 = 666.

It is a super-2 number, since 2×18649357290² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79390 + ... + 208809.

It is an arithmetic number, because the mean of its divisors is an integer number (1011582000).

It is a 1-persistent number, because it is pandigital, but 2⋅18649357290 = 37298714580 is not.

Almost surely, 2^18649357290 is an apocalyptic number.

18649357290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18649357290 is an abundant number, since it is smaller than the sum of its proper divisors (29906578710).

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

18649357290 is a wasteful number, since it uses less digits than its factorization.

18649357290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288931 (or 288928 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 54.

The spelling of 18649357290 in words is "eighteen billion, six hundred forty-nine million, three hundred fifty-seven thousand, two hundred ninety".