2001821492 has 24 divisors (see below), whose sum is σ = 3822917952. Its totient is φ = 909619200.

The previous prime is 2001821489. The next prime is 2001821533. The reversal of 2001821492 is 2941281002.

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, 180788 + ... + 191540.

It is an arithmetic number, because the mean of its divisors is an integer number (159288248).

Almost surely, 2^2001821492 is an apocalyptic number.

2001821492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2001821492 is a deficient number, since it is larger than the sum of its proper divisors (1821096460).

2001821492 is a wasteful number, since it uses less digits than its factorization.

2001821492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14999 (or 14997 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 2001821492 is about 44741.7198149557. The cubic root of 2001821492 is about 1260.3034231889.

The spelling of 2001821492 in words is "two billion, one million, eight hundred twenty-one thousand, four hundred ninety-two".