2001990102 has 32 divisors (see below), whose sum is σ = 4583112192. Its totient is φ = 571105344.

The previous prime is 2001990101. The next prime is 2001990103. The reversal of 2001990102 is 2010991002.

It is an interprime number because it is at equal distance from previous prime (2001990101) and next prime (2001990103).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001990101) 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, 9663 + ... + 64010.

It is an arithmetic number, because the mean of its divisors is an integer number (143222256).

Almost surely, 2^2001990102 is an apocalyptic number.

2001990102 is an abundant number, since it is smaller than the sum of its proper divisors (2581122090).

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

2001990102 is a wasteful number, since it uses less digits than its factorization.

2001990102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74332.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 2001990102 is about 44743.6040345433. The cubic root of 2001990102 is about 1260.3388065960.

The spelling of 2001990102 in words is "two billion, one million, nine hundred ninety thousand, one hundred two".