20767742 has 4 divisors (see below), whose sum is σ = 31151616. Its totient is φ = 10383870.

The previous prime is 20767739. The next prime is 20767751. The reversal of 20767742 is 24776702.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5191934 + ... + 5191937.

It is an arithmetic number, because the mean of its divisors is an integer number (7787904).

Almost surely, 2^20767742 is an apocalyptic number.

20767742 is a deficient number, since it is larger than the sum of its proper divisors (10383874).

20767742 is a wasteful number, since it uses less digits than its factorization.

20767742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10383873.

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 20767742 is about 4557.1638109684. The cubic root of 20767742 is about 274.8715300755.

The spelling of 20767742 in words is "twenty million, seven hundred sixty-seven thousand, seven hundred forty-two".