20667634 has 16 divisors (see below), whose sum is σ = 33512472. Its totient is φ = 9502848.

The previous prime is 20667629. The next prime is 20667659. The reversal of 20667634 is 43676602.

It can be written as a sum of positive squares in 4 ways, for example, as 20657025 + 10609 = 4545^2 + 103^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20667634.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6262 + ... + 8974.

Almost surely, 2^20667634 is an apocalyptic number.

20667634 is a deficient number, since it is larger than the sum of its proper divisors (12844838).

20667634 is a wasteful number, since it uses less digits than its factorization.

20667634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021.

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 20667634 is about 4546.1669568990. The cubic root of 20667634 is about 274.4291585744.

The spelling of 20667634 in words is "twenty million, six hundred sixty-seven thousand, six hundred thirty-four".