18536736 has 48 divisors (see below), whose sum is σ = 48885984. Its totient is φ = 6150144.

The previous prime is 18536719. The next prime is 18536737. The reversal of 18536736 is 63763581.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×18536736² = 687221163067392, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18536694 and 18536703.

It is not an unprimeable number, because it can be changed into a prime (18536737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33615 + ... + 34161.

It is an arithmetic number, because the mean of its divisors is an integer number (1018458).

Almost surely, 2^18536736 is an apocalyptic number.

18536736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18536736 is an abundant number, since it is smaller than the sum of its proper divisors (30349248).

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

18536736 is a wasteful number, since it uses less digits than its factorization.

18536736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913 (or 905 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 18536736 is about 4305.4309888790. The cubic root of 18536736 is about 264.6535689097.

The spelling of 18536736 in words is "eighteen million, five hundred thirty-six thousand, seven hundred thirty-six".