21151040148676 has 81 divisors (see below), whose sum is σ = 40161598748397. Its totient is φ = 9745152132960.

The previous prime is 21151040148653. The next prime is 21151040148757. The reversal of 21151040148676 is 67684104015112.

The square root of 21151040148676 is 4599026.

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., 18926241184900 + 2224798963776 = 4350430^2 + 1491576^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6466228921 + ... + 6466232191.

Almost surely, 2^{21151040148676} is an apocalyptic number.

21151040148676 is the 4599026-th square number.

It is an amenable number.

21151040148676 is a deficient number, since it is larger than the sum of its proper divisors (19010558599721).

21151040148676 is an frugal number, since it uses more digits than its factorization.

21151040148676 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6658 (or 3329 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 21151040148676 in words is "twenty-one trillion, one hundred fifty-one billion, forty million, one hundred forty-eight thousand, six hundred seventy-six".