21930413857372 has 6 divisors (see below), whose sum is σ = 38378224250408. Its totient is φ = 10965206928684.

The previous prime is 21930413857343. The next prime is 21930413857381. The reversal of 21930413857372 is 27375831403912.

It is a super-2 number, since 2×21930413857372² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2741301732168 + ... + 2741301732175.

Almost surely, 2^{21930413857372} is an apocalyptic number.

It is an amenable number.

21930413857372 is a deficient number, since it is larger than the sum of its proper divisors (16447810393036).

21930413857372 is a wasteful number, since it uses less digits than its factorization.

21930413857372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5482603464347 (or 5482603464345 counting only the distinct ones).

The product of its (nonzero) digits is 7620480, while the sum is 55.

The spelling of 21930413857372 in words is "twenty-one trillion, nine hundred thirty billion, four hundred thirteen million, eight hundred fifty-seven thousand, three hundred seventy-two".