20021910216 has 64 divisors (see below), whose sum is σ = 62405959680. Its totient is φ = 5200495680.

The previous prime is 20021910203. The next prime is 20021910221. The reversal of 20021910216 is 61201912002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5415336 + ... + 5419031.

It is an arithmetic number, because the mean of its divisors is an integer number (975093120).

Almost surely, 2^20021910216 is an apocalyptic number.

It is an amenable number.

20021910216 is an abundant number, since it is smaller than the sum of its proper divisors (42384049464).

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

20021910216 is a wasteful number, since it uses less digits than its factorization.

20021910216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10834394 (or 10834390 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 20021910216 in words is "twenty billion, twenty-one million, nine hundred ten thousand, two hundred sixteen".