20742527 has 16 divisors (see below), whose sum is σ = 23502528. Its totient is φ = 18163200.

The previous prime is 20742523. The next prime is 20742539. The reversal of 20742527 is 72524702.

It is a cyclic number.

It is not a de Polignac number, because 20742527 - 2² = 20742523 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20742527.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20742521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51527 + ... + 51927.

It is an arithmetic number, because the mean of its divisors is an integer number (1468908).

Almost surely, 2^20742527 is an apocalyptic number.

20742527 is a deficient number, since it is larger than the sum of its proper divisors (2760001).

20742527 is a wasteful number, since it uses less digits than its factorization.

20742527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 610.

The product of its (nonzero) digits is 7840, while the sum is 29.

The square root of 20742527 is about 4554.3964473901. The cubic root of 20742527 is about 274.7602406127.

It can be divided in two parts, 207 and 42527, that multiplied together give a square (8803089 = 2967²).

The spelling of 20742527 in words is "twenty million, seven hundred forty-two thousand, five hundred twenty-seven".