21375200763626 has 4 divisors (see below), whose sum is σ = 32062801145442. Its totient is φ = 10687600381812.

The previous prime is 21375200763619. The next prime is 21375200763641. The reversal of 21375200763626 is 62636700257312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19809611738401 + 1565589025225 = 4450799^2 + 1251235^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5343800190905 + ... + 5343800190908.

Almost surely, 2^{21375200763626} is an apocalyptic number.

21375200763626 is a deficient number, since it is larger than the sum of its proper divisors (10687600381816).

21375200763626 is a wasteful number, since it uses less digits than its factorization.

21375200763626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10687600381815.

The product of its (nonzero) digits is 3810240, while the sum is 50.

The spelling of 21375200763626 in words is "twenty-one trillion, three hundred seventy-five billion, two hundred million, seven hundred sixty-three thousand, six hundred twenty-six".