20767490 has 16 divisors (see below), whose sum is σ = 37469952. Its totient is φ = 8287344.

The previous prime is 20767477. The next prime is 20767501. The reversal of 20767490 is 9476702.

It is a self number, because there is not a number n which added to its sum of digits gives 20767490.

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 7 ways as a sum of consecutive naturals, for example, 2447 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (2341872).

Almost surely, 2^20767490 is an apocalyptic number.

20767490 is a deficient number, since it is larger than the sum of its proper divisors (16702462).

20767490 is a wasteful number, since it uses less digits than its factorization.

20767490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 20767490 is about 4557.1361621088. The cubic root of 20767490 is about 274.8704182887.

The spelling of 20767490 in words is "twenty million, seven hundred sixty-seven thousand, four hundred ninety".