36518421 has 4 divisors (see below), whose sum is σ = 48691232. Its totient is φ = 24345612.

The previous prime is 36518407. The next prime is 36518429. The reversal of 36518421 is 12481563.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12481563 = 3 ⋅4160521.

It is not a de Polignac number, because 36518421 - 2⁹ = 36517909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36518429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6086401 + ... + 6086406.

It is an arithmetic number, because the mean of its divisors is an integer number (12172808).

Almost surely, 2^36518421 is an apocalyptic number.

It is an amenable number.

36518421 is a deficient number, since it is larger than the sum of its proper divisors (12172811).

36518421 is a wasteful number, since it uses less digits than its factorization.

36518421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12172810.

The product of its digits is 5760, while the sum is 30.

The square root of 36518421 is about 6043.0473273010. The cubic root of 36518421 is about 331.7701662066.

Adding to 36518421 its reverse (12481563), we get a palindrome (48999984).

The spelling of 36518421 in words is "thirty-six million, five hundred eighteen thousand, four hundred twenty-one".