36421581820 has 48 divisors (see below), whose sum is σ = 82650103200. Its totient is φ = 13402043136.

The previous prime is 36421581809. The next prime is 36421581839. The reversal of 36421581820 is 2818512463.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162870 + ... + 315229.

It is an arithmetic number, because the mean of its divisors is an integer number (1721877150).

Almost surely, 2^36421581820 is an apocalyptic number.

It is an amenable number.

36421581820 is an abundant number, since it is smaller than the sum of its proper divisors (46228521380).

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

36421581820 is a wasteful number, since it uses less digits than its factorization.

36421581820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478414 (or 478412 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 40.

The spelling of 36421581820 in words is "thirty-six billion, four hundred twenty-one million, five hundred eighty-one thousand, eight hundred twenty".