20742134 has 32 divisors (see below), whose sum is σ = 37601280. Its totient is φ = 8392608.

The previous prime is 20742109. The next prime is 20742151. The reversal of 20742134 is 43124702.

It is a super-2 number, since 2×20742134² = 860472245747912, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18539 + ... + 19625.

It is an arithmetic number, because the mean of its divisors is an integer number (1175040).

Almost surely, 2^20742134 is an apocalyptic number.

20742134 is a deficient number, since it is larger than the sum of its proper divisors (16859146).

20742134 is a wasteful number, since it uses less digits than its factorization.

20742134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 20742134 is about 4554.3533020617. The cubic root of 20742134 is about 274.7585053459.

Adding to 20742134 its reverse (43124702), we get a palindrome (63866836).

The spelling of 20742134 in words is "twenty million, seven hundred forty-two thousand, one hundred thirty-four".