20749027 has 8 divisors (see below), whose sum is σ = 23659776. Its totient is φ = 18026112.

The previous prime is 20749021. The next prime is 20749037. The reversal of 20749027 is 72094702.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20749027 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 20749027.

It is not an unprimeable number, because it can be changed into a prime (20749021) 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, 46723 + ... + 47164.

It is an arithmetic number, because the mean of its divisors is an integer number (2957472).

Almost surely, 2^20749027 is an apocalyptic number.

20749027 is a deficient number, since it is larger than the sum of its proper divisors (2910749).

20749027 is a wasteful number, since it uses less digits than its factorization.

20749027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93917.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 20749027 is about 4555.1099876951. The cubic root of 20749027 is about 274.7889377759.

The spelling of 20749027 in words is "twenty million, seven hundred forty-nine thousand, twenty-seven".