20898439884 has 96 divisors (see below), whose sum is σ = 61953561600. Its totient is φ = 5967872640.

The previous prime is 20898439867. The next prime is 20898439921. The reversal of 20898439884 is 48893489802.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1718377 + ... + 1730495.

It is an arithmetic number, because the mean of its divisors is an integer number (645349600).

Almost surely, 2^20898439884 is an apocalyptic number.

It is an amenable number.

20898439884 is an abundant number, since it is smaller than the sum of its proper divisors (41055121716).

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

20898439884 is a wasteful number, since it uses less digits than its factorization.

20898439884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14420 (or 14412 counting only the distinct ones).

The product of its (nonzero) digits is 31850496, while the sum is 63.

The spelling of 20898439884 in words is "twenty billion, eight hundred ninety-eight million, four hundred thirty-nine thousand, eight hundred eighty-four".