20749858 has 8 divisors (see below), whose sum is σ = 31288320. Its totient is φ = 10320420.

The previous prime is 20749837. The next prime is 20749879. The reversal of 20749858 is 85894702.

It is an interprime number because it is at equal distance from previous prime (20749837) and next prime (20749879).

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26778 + ... + 27541.

It is an arithmetic number, because the mean of its divisors is an integer number (3911040).

Almost surely, 2^20749858 is an apocalyptic number.

20749858 is a deficient number, since it is larger than the sum of its proper divisors (10538462).

20749858 is a wasteful number, since it uses less digits than its factorization.

20749858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54512.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 20749858 is about 4555.2012030206. The cubic root of 20749858 is about 274.7926061657.

The spelling of 20749858 in words is "twenty million, seven hundred forty-nine thousand, eight hundred fifty-eight".