21703770437052 has 36 divisors (see below), whose sum is σ = 55664491124648. Its totient is φ = 6576900132000.

The previous prime is 21703770436963. The next prime is 21703770437053. The reversal of 21703770437052 is 25073407730712.

It is a junction number, because it is equal to n+sod(n) for n = 21703770436992 and 21703770437010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21703770437053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7473748699 + ... + 7473751602.

Almost surely, 2^{21703770437052} is an apocalyptic number.

21703770437052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21703770437052 is an abundant number, since it is smaller than the sum of its proper divisors (33960720687596).

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

21703770437052 is a wasteful number, since it uses less digits than its factorization.

21703770437052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14947500330 (or 14947500317 counting only the distinct ones).

The product of its (nonzero) digits is 1728720, while the sum is 48.

The spelling of 21703770437052 in words is "twenty-one trillion, seven hundred three billion, seven hundred seventy million, four hundred thirty-seven thousand, fifty-two".