20330451 has 12 divisors (see below), whose sum is σ = 30313920. Its totient is φ = 13116240.

The previous prime is 20330411. The next prime is 20330467. The reversal of 20330451 is 15403302.

It is not a de Polignac number, because 20330451 - 2¹⁴ = 20314067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20330411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36156 + ... + 36713.

It is an arithmetic number, because the mean of its divisors is an integer number (2526160).

Almost surely, 2^20330451 is an apocalyptic number.

20330451 is a deficient number, since it is larger than the sum of its proper divisors (9983469).

20330451 is a wasteful number, since it uses less digits than its factorization.

20330451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72906 (or 72903 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20330451 is about 4508.9301391794. The cubic root of 20330451 is about 272.9285728686.

Adding to 20330451 its reverse (15403302), we get a palindrome (35733753).

The spelling of 20330451 in words is "twenty million, three hundred thirty thousand, four hundred fifty-one".