20361451 has 24 divisors (see below), whose sum is σ = 24081408. Its totient is φ = 17052000.

The previous prime is 20361443. The next prime is 20361457. The reversal of 20361451 is 15416302.

It is not a de Polignac number, because 20361451 - 2³ = 20361443 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20361457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286746 + ... + 286816.

It is an arithmetic number, because the mean of its divisors is an integer number (1003392).

Almost surely, 2^20361451 is an apocalyptic number.

20361451 is a deficient number, since it is larger than the sum of its proper divisors (3719957).

20361451 is a wasteful number, since it uses less digits than its factorization.

20361451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20361451 is about 4512.3664523175. The cubic root of 20361451 is about 273.0672234908.

Adding to 20361451 its reverse (15416302), we get a palindrome (35777753).

The spelling of 20361451 in words is "twenty million, three hundred sixty-one thousand, four hundred fifty-one".