20866512882 has 32 divisors (see below), whose sum is σ = 42133512960. Its totient is φ = 6888810240.

The previous prime is 20866512853. The next prime is 20866512911. The reversal of 20866512882 is 28821566802.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20866512853) and next prime (20866512911).

It is a super-2 number, since 2×20866512882² (a number of 21 digits) contains 22 as substring.

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, 2036023 + ... + 2046245.

It is an arithmetic number, because the mean of its divisors is an integer number (1316672280).

Almost surely, 2^20866512882 is an apocalyptic number.

20866512882 is an abundant number, since it is smaller than the sum of its proper divisors (21267000078).

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

20866512882 is a wasteful number, since it uses less digits than its factorization.

20866512882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13458.

The product of its (nonzero) digits is 737280, while the sum is 48.

The spelling of 20866512882 in words is "twenty billion, eight hundred sixty-six million, five hundred twelve thousand, eight hundred eighty-two".