21080623380496 has 15 divisors (see below), whose sum is σ = 40843743382813. Its totient is φ = 10540302507520.

The previous prime is 21080623380493. The next prime is 21080623380533. The reversal of 21080623380496 is 69408332608012.

The square root of 21080623380496 is 4591364.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 3788332820496 + 17292290560000 = 1946364^2 + 4158400^2 .

It is a super-2 number, since 2×21080623380496² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21080623380491) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 17791536 + ... + 18939376.

Almost surely, 2^{21080623380496} is an apocalyptic number.

21080623380496 is the 4591364-th square number.

It is an amenable number.

21080623380496 is a deficient number, since it is larger than the sum of its proper divisors (19763120002317).

21080623380496 is an frugal number, since it uses more digits than its factorization.

21080623380496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2295690 (or 1147843 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 52.

The spelling of 21080623380496 in words is "twenty-one trillion, eighty billion, six hundred twenty-three million, three hundred eighty thousand, four hundred ninety-six".