20922789887998 has 16 divisors (see below), whose sum is σ = 31572498885984. Its totient is φ = 10398625120000.

The previous prime is 20922789887947. The next prime is 20922789888023. The reversal of 20922789887998 is 89978898722902.

It is a super-2 number, since 2×20922789887998² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30892998 + ... + 31562998.

It is an arithmetic number, because the mean of its divisors is an integer number (1973281180374).

Almost surely, 2^{20922789887998} is an apocalyptic number.

20922789887998 is a deficient number, since it is larger than the sum of its proper divisors (10649708997986).

20922789887998 is a wasteful number, since it uses less digits than its factorization.

20922789887998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763667.

The product of its (nonzero) digits is 10534551552, while the sum is 88.

The spelling of 20922789887998 in words is "twenty trillion, nine hundred twenty-two billion, seven hundred eighty-nine million, eight hundred eighty-seven thousand, nine hundred ninety-eight".