20867099904 has 288 divisors, whose sum is σ = 74238080000. Its totient is φ = 5647988736.

The previous prime is 20867099893. The next prime is 20867099927. The reversal of 20867099904 is 40999076802.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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, 907947 + ... + 930645.

Almost surely, 2^20867099904 is an apocalyptic number.

20867099904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20867099904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37119040000).

20867099904 is an abundant number, since it is smaller than the sum of its proper divisors (53370980096).

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

20867099904 is a wasteful number, since it uses less digits than its factorization.

20867099904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22750 (or 22730 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 54.

The spelling of 20867099904 in words is "twenty billion, eight hundred sixty-seven million, ninety-nine thousand, nine hundred four".