20889213504284 has 24 divisors (see below), whose sum is σ = 36571129454160. Its totient is φ = 10440319785984.

The previous prime is 20889213504251. The next prime is 20889213504287. The reversal of 20889213504284 is 48240531298802.

It is a super-2 number, since 2×20889213504284² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20889213504287) 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, 277268732 + ... + 277344060.

It is an arithmetic number, because the mean of its divisors is an integer number (1523797060590).

Almost surely, 2^{20889213504284} is an apocalyptic number.

It is an amenable number.

20889213504284 is a deficient number, since it is larger than the sum of its proper divisors (15681915949876).

20889213504284 is a wasteful number, since it uses less digits than its factorization.

20889213504284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102869 (or 102867 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 56.

The spelling of 20889213504284 in words is "twenty trillion, eight hundred eighty-nine billion, two hundred thirteen million, five hundred four thousand, two hundred eighty-four".