20010221688 has 32 divisors (see below), whose sum is σ = 52968234960. Its totient is φ = 6277716480.

The previous prime is 20010221687. The next prime is 20010221689. The reversal of 20010221688 is 88612201002.

It is an interprime number because it is at equal distance from previous prime (20010221687) and next prime (20010221689).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010221683) 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, 24521923 + ... + 24522738.

Almost surely, 2^20010221688 is an apocalyptic number.

It is an amenable number.

20010221688 is an abundant number, since it is smaller than the sum of its proper divisors (32958013272).

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

20010221688 is a wasteful number, since it uses less digits than its factorization.

20010221688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49044687 (or 49044683 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The spelling of 20010221688 in words is "twenty billion, ten million, two hundred twenty-one thousand, six hundred eighty-eight".