20621476 has 12 divisors (see below), whose sum is σ = 38210508. Its totient is φ = 9704192.

The previous prime is 20621443. The next prime is 20621519. The reversal of 20621476 is 67412602.

It can be written as a sum of positive squares in 2 ways, for example, as 8856576 + 11764900 = 2976^2 + 3430^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151561 + ... + 151696.

It is an arithmetic number, because the mean of its divisors is an integer number (3184209).

Almost surely, 2^20621476 is an apocalyptic number.

It is an amenable number.

20621476 is a deficient number, since it is larger than the sum of its proper divisors (17589032).

20621476 is a wasteful number, since it uses less digits than its factorization.

20621476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303278 (or 303276 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 20621476 is about 4541.0875349414. The cubic root of 20621476 is about 274.2247077758.

The spelling of 20621476 in words is "twenty million, six hundred twenty-one thousand, four hundred seventy-six".