20302742 has 16 divisors (see below), whose sum is σ = 31229952. Its totient is φ = 9896040.

The previous prime is 20302741. The next prime is 20302747. The reversal of 20302742 is 24720302.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20302741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13067 + ... + 14537.

It is an arithmetic number, because the mean of its divisors is an integer number (1951872).

Almost surely, 2^20302742 is an apocalyptic number.

20302742 is a deficient number, since it is larger than the sum of its proper divisors (10927210).

20302742 is a wasteful number, since it uses less digits than its factorization.

20302742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 20302742 is about 4505.8564113829. The cubic root of 20302742 is about 272.8045222316.

The spelling of 20302742 in words is "twenty million, three hundred two thousand, seven hundred forty-two".