21700002389604 has 288 divisors, whose sum is σ = 65683449151488. Its totient is φ = 5452374470400.

The previous prime is 21700002389587. The next prime is 21700002389629. The reversal of 21700002389604 is 40698320000712.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 881277637 + ... + 881302259.

It is an arithmetic number, because the mean of its divisors is an integer number (228067531776).

Almost surely, 2^{21700002389604} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21700002389604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32841724575744).

21700002389604 is an abundant number, since it is smaller than the sum of its proper divisors (43983446761884).

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

21700002389604 is a wasteful number, since it uses less digits than its factorization.

21700002389604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27487 (or 27474 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 42.

The spelling of 21700002389604 in words is "twenty-one trillion, seven hundred billion, two million, three hundred eighty-nine thousand, six hundred four".