20488015 has 4 divisors (see below), whose sum is σ = 24585624. Its totient is φ = 16390408.

The previous prime is 20488003. The next prime is 20488033. The reversal of 20488015 is 51088402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51088402 = 2 ⋅25544201.

It is a cyclic number.

It is not a de Polignac number, because 20488015 - 2¹¹ = 20485967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2048797 + ... + 2048806.

It is an arithmetic number, because the mean of its divisors is an integer number (6146406).

Almost surely, 2^20488015 is an apocalyptic number.

20488015 is a deficient number, since it is larger than the sum of its proper divisors (4097609).

20488015 is an equidigital number, since it uses as much as digits as its factorization.

20488015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4097608.

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 20488015 is about 4526.3688537281. The cubic root of 20488015 is about 273.6318381081.

The spelling of 20488015 in words is "twenty million, four hundred eighty-eight thousand, fifteen".