20742883 has 4 divisors (see below), whose sum is σ = 23706160. Its totient is φ = 17779608.

The previous prime is 20742881. The next prime is 20742893. The reversal of 20742883 is 38824702.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20742883 - 2¹ = 20742881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20742881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1481628 + ... + 1481641.

It is an arithmetic number, because the mean of its divisors is an integer number (5926540).

Almost surely, 2^20742883 is an apocalyptic number.

20742883 is a deficient number, since it is larger than the sum of its proper divisors (2963277).

20742883 is an equidigital number, since it uses as much as digits as its factorization.

20742883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2963276.

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 20742883 is about 4554.4355303374. The cubic root of 20742883 is about 274.7618124895.

The spelling of 20742883 in words is "twenty million, seven hundred forty-two thousand, eight hundred eighty-three".