20019671220 has 48 divisors (see below), whose sum is σ = 56599320960. Its totient is φ = 5286746496.

The previous prime is 20019671179. The next prime is 20019671227. The reversal of 20019671220 is 2217691002.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019671227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1613535 + ... + 1625894.

It is an arithmetic number, because the mean of its divisors is an integer number (1179152520).

Almost surely, 2^20019671220 is an apocalyptic number.

20019671220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20019671220 is an abundant number, since it is smaller than the sum of its proper divisors (36579649740).

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

20019671220 is a wasteful number, since it uses less digits than its factorization.

20019671220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3239544 (or 3239542 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 30.

The spelling of 20019671220 in words is "twenty billion, nineteen million, six hundred seventy-one thousand, two hundred twenty".