20021200988 has 12 divisors (see below), whose sum is σ = 35038093272. Its totient is φ = 10010317200.

The previous prime is 20021200967. The next prime is 20021200993. The reversal of 20021200988 is 88900212002.

It is a super-2 number, since 2×20021200988² (a number of 21 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, 233138 + ... + 307238.

It is an arithmetic number, because the mean of its divisors is an integer number (2919841106).

Almost surely, 2^20021200988 is an apocalyptic number.

It is an amenable number.

20021200988 is a deficient number, since it is larger than the sum of its proper divisors (15016892284).

20021200988 is a wasteful number, since it uses less digits than its factorization.

20021200988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141652 (or 141650 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The spelling of 20021200988 in words is "twenty billion, twenty-one million, two hundred thousand, nine hundred eighty-eight".