18899846033 has 6 divisors (see below), whose sum is σ = 20012201874. Its totient is φ = 17787556896.

The previous prime is 18899846023. The next prime is 18899846039. The reversal of 18899846033 is 33064899881.

It can be written as a sum of positive squares in only one way, i.e., 17788090384 + 1111755649 = 133372^2 + 33343^2 .

It is not a de Polignac number, because 18899846033 - 2⁶ = 18899845969 is a prime.

It is a super-2 number, since 2×18899846033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18899846039) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 550160 + ... + 583502.

It is an arithmetic number, because the mean of its divisors is an integer number (3335366979).

Almost surely, 2^18899846033 is an apocalyptic number.

It is an amenable number.

18899846033 is a deficient number, since it is larger than the sum of its proper divisors (1112355841).

18899846033 is an frugal number, since it uses more digits than its factorization.

18899846033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66703 (or 33360 counting only the distinct ones).

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 18899846033 in words is "eighteen billion, eight hundred ninety-nine million, eight hundred forty-six thousand, thirty-three".