21004730902708 has 24 divisors (see below), whose sum is σ = 42013554078272. Its totient is φ = 9001150614144.

The previous prime is 21004730902583. The next prime is 21004730902741. The reversal of 21004730902708 is 80720903740012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36245541 + ... + 36820492.

Almost surely, 2^{21004730902708} is an apocalyptic number.

21004730902708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21004730902708 is an abundant number, since it is smaller than the sum of its proper divisors (21008823175564).

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

21004730902708 is a wasteful number, since it uses less digits than its factorization.

21004730902708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73076311 (or 73076309 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 21004730902708 in words is "twenty-one trillion, four billion, seven hundred thirty million, nine hundred two thousand, seven hundred eight".