2102651840 has 56 divisors (see below), whose sum is σ = 5123413680. Its totient is φ = 821495808.

The previous prime is 2102651833. The next prime is 2102651857. The reversal of 2102651840 is 481562012.

It is a super-2 number, since 2×2102651840² = 8842289520510771200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62645 + ... + 90164.

It is an arithmetic number, because the mean of its divisors is an integer number (91489530).

Almost surely, 2^2102651840 is an apocalyptic number.

2102651840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102651840 is an abundant number, since it is smaller than the sum of its proper divisors (3020761840).

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

2102651840 is a wasteful number, since it uses less digits than its factorization.

2102651840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152869 (or 152859 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 2102651840 is about 45854.6817675142. The cubic root of 2102651840 is about 1281.1179685800.

The spelling of 2102651840 in words is "two billion, one hundred two million, six hundred fifty-one thousand, eight hundred forty".