20415099 has 8 divisors (see below), whose sum is σ = 28403712. Its totient is φ = 13018280.

The previous prime is 20415091. The next prime is 20415103. The reversal of 20415099 is 99051402.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20415099 - 2³ = 20415091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20415091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147867 + ... + 148004.

It is an arithmetic number, because the mean of its divisors is an integer number (3550464).

Almost surely, 2^20415099 is an apocalyptic number.

20415099 is a deficient number, since it is larger than the sum of its proper divisors (7988613).

20415099 is a wasteful number, since it uses less digits than its factorization.

20415099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295897.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 20415099 is about 4518.3070944769. The cubic root of 20415099 is about 273.3068374409.

It can be divided in two parts, 2041 and 5099, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 20415099 in words is "twenty million, four hundred fifteen thousand, ninety-nine".