2021508940 has 48 divisors (see below), whose sum is σ = 4676997024. Its totient is φ = 727808000.

The previous prime is 2021508901. The next prime is 2021508941. The reversal of 2021508940 is 498051202.

It is a super-3 number, since 3×2021508940³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (2021508941) 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, 23269 + ... + 67708.

It is an arithmetic number, because the mean of its divisors is an integer number (97437438).

Almost surely, 2^2021508940 is an apocalyptic number.

2021508940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2021508940 is an abundant number, since it is smaller than the sum of its proper divisors (2655488084).

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

2021508940 is a wasteful number, since it uses less digits than its factorization.

2021508940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91098 (or 91096 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 2021508940 is about 44961.1937119112. The cubic root of 2021508940 is about 1264.4215491292.

The spelling of 2021508940 in words is "two billion, twenty-one million, five hundred eight thousand, nine hundred forty".