20202021804 has 12 divisors (see below), whose sum is σ = 47138050904. Its totient is φ = 6734007264.

The previous prime is 20202021787. The next prime is 20202021821. The reversal of 20202021804 is 40812020202.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20202021787) and next prime (20202021821).

It is a tau number, because it is divible by the number of its divisors (12).

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, 841750897 + ... + 841750920.

Almost surely, 2^20202021804 is an apocalyptic number.

It is an amenable number.

20202021804 is an abundant number, since it is smaller than the sum of its proper divisors (26936029100).

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

20202021804 is a wasteful number, since it uses less digits than its factorization.

20202021804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1683501824 (or 1683501822 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The spelling of 20202021804 in words is "twenty billion, two hundred two million, twenty-one thousand, eight hundred four".