20703451 has 4 divisors (see below), whose sum is σ = 20965600. Its totient is φ = 20441304.

The previous prime is 20703439. The next prime is 20703479. The reversal of 20703451 is 15430702.

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

It is a cyclic number.

It is not a de Polignac number, because 20703451 - 2¹⁷ = 20572379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20703421) 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, 130956 + ... + 131113.

It is an arithmetic number, because the mean of its divisors is an integer number (5241400).

Almost surely, 2^20703451 is an apocalyptic number.

20703451 is a deficient number, since it is larger than the sum of its proper divisors (262149).

20703451 is an equidigital number, since it uses as much as digits as its factorization.

20703451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262148.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 20703451 is about 4550.1045042944. The cubic root of 20703451 is about 274.5875956201.

The spelling of 20703451 in words is "twenty million, seven hundred three thousand, four hundred fifty-one".