20270821284 has 72 divisors (see below), whose sum is σ = 62004878208. Its totient is φ = 5450976000.

The previous prime is 20270821279. The next prime is 20270821309. The reversal of 20270821284 is 48212807202.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2361592 + ... + 2370159.

It is an arithmetic number, because the mean of its divisors is an integer number (861178864).

Almost surely, 2^20270821284 is an apocalyptic number.

It is an amenable number.

20270821284 is an abundant number, since it is smaller than the sum of its proper divisors (41734056924).

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

20270821284 is a wasteful number, since it uses less digits than its factorization.

20270821284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4731785 (or 4731780 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The spelling of 20270821284 in words is "twenty billion, two hundred seventy million, eight hundred twenty-one thousand, two hundred eighty-four".