20202221987 has 8 divisors (see below), whose sum is σ = 20541414432. Its totient is φ = 19863288000.

The previous prime is 20202221939. The next prime is 20202221989. The reversal of 20202221987 is 78912220202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20202221987 - 2¹⁴ = 20202205603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20202221989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96362 + ... + 222912.

It is an arithmetic number, because the mean of its divisors is an integer number (2567676804).

Almost surely, 2^20202221987 is an apocalyptic number.

20202221987 is a deficient number, since it is larger than the sum of its proper divisors (339192445).

20202221987 is a wasteful number, since it uses less digits than its factorization.

20202221987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129229.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 20202221987 in words is "twenty billion, two hundred two million, two hundred twenty-one thousand, nine hundred eighty-seven".