2031724820 has 18 divisors (see below), whose sum is σ = 4267045482. Its totient is φ = 812609296.

The previous prime is 2031724811. The next prime is 2031724847. The reversal of 2031724820 is 284271302.

It can be written as a sum of positive squares in only one way, i.e., 1625379856 + 406344964 = 40316^2 + 20158^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196541 + ... + 206619.

Almost surely, 2^2031724820 is an apocalyptic number.

2031724820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031724820 is an abundant number, since it is smaller than the sum of its proper divisors (2235320662).

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

2031724820 is an frugal number, since it uses more digits than its factorization.

2031724820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20167 (or 10086 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 2031724820 is about 45074.6582904408. The cubic root of 2031724820 is about 1266.5479277739.

The spelling of 2031724820 in words is "two billion, thirty-one million, seven hundred twenty-four thousand, eight hundred twenty".