2020821642904 has 16 divisors (see below), whose sum is σ = 3789808755120. Its totient is φ = 1010205974880.

The previous prime is 2020821642893. The next prime is 2020821642929. The reversal of 2020821642904 is 4092461280202.

It is a happy number.

It is a super-2 number, since 2×2020821642904² (a number of 25 digits) 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 3 ways as a sum of consecutive naturals, for example, 25563892 + ... + 25642819.

It is an arithmetic number, because the mean of its divisors is an integer number (236863047195).

Almost surely, 2^{2020821642904} is an apocalyptic number.

It is an amenable number.

2020821642904 is a deficient number, since it is larger than the sum of its proper divisors (1768987112216).

2020821642904 is a wasteful number, since it uses less digits than its factorization.

2020821642904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51211650 (or 51211646 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 2020821642904 in words is "two trillion, twenty billion, eight hundred twenty-one million, six hundred forty-two thousand, nine hundred four".