20474002220 has 72 divisors (see below), whose sum is σ = 50375218320. Its totient is φ = 6969110400.

The previous prime is 20474002169. The next prime is 20474002231. The reversal of 20474002220 is 2220047402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 61070 + ... + 211370.

It is an arithmetic number, because the mean of its divisors is an integer number (699655810).

Almost surely, 2^20474002220 is an apocalyptic number.

20474002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20474002220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25187609160).

20474002220 is an abundant number, since it is smaller than the sum of its proper divisors (29901216100).

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

20474002220 is a wasteful number, since it uses less digits than its factorization.

20474002220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150463 (or 150454 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

Adding to 20474002220 its reverse (2220047402), we get a palindrome (22694049622).

The spelling of 20474002220 in words is "twenty billion, four hundred seventy-four million, two thousand, two hundred twenty".