2921997020 has 48 divisors (see below), whose sum is σ = 6294220128. Its totient is φ = 1138775040.

The previous prime is 2921997019. The next prime is 2921997047. The reversal of 2921997020 is 207991292.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 766439 + ... + 770241.

It is an arithmetic number, because the mean of its divisors is an integer number (131129586).

Almost surely, 2^2921997020 is an apocalyptic number.

2921997020 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 2921997020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3147110064).

2921997020 is an abundant number, since it is smaller than the sum of its proper divisors (3372223108).

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

2921997020 is a wasteful number, since it uses less digits than its factorization.

2921997020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790 (or 4788 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 2921997020 is about 54055.4994427024. The cubic root of 2921997020 is about 1429.6396666557.

The spelling of 2921997020 in words is "two billion, nine hundred twenty-one million, nine hundred ninety-seven thousand, twenty".