20632415 has 4 divisors (see below), whose sum is σ = 24758904. Its totient is φ = 16505928.

The previous prime is 20632411. The next prime is 20632429. The reversal of 20632415 is 51423602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51423602 = 2 ⋅25711801.

It is a cyclic number.

It is not a de Polignac number, because 20632415 - 2² = 20632411 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 (20632411) 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, 2063237 + ... + 2063246.

It is an arithmetic number, because the mean of its divisors is an integer number (6189726).

Almost surely, 2^20632415 is an apocalyptic number.

20632415 is a deficient number, since it is larger than the sum of its proper divisors (4126489).

20632415 is an equidigital number, since it uses as much as digits as its factorization.

20632415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4126488.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 20632415 is about 4542.2918224174. The cubic root of 20632415 is about 274.2731882016.

The spelling of 20632415 in words is "twenty million, six hundred thirty-two thousand, four hundred fifteen".