20299126 has 4 divisors (see below), whose sum is σ = 30448692. Its totient is φ = 10149562.

The previous prime is 20299117. The next prime is 20299151. The reversal of 20299126 is 62199202.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5074780 + ... + 5074783.

It is an arithmetic number, because the mean of its divisors is an integer number (7612173).

Almost surely, 2^20299126 is an apocalyptic number.

20299126 is the 2850-th centered pentagonal number.

20299126 is a deficient number, since it is larger than the sum of its proper divisors (10149566).

20299126 is a wasteful number, since it uses less digits than its factorization.

20299126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10149565.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 20299126 is about 4505.4551379411. The cubic root of 20299126 is about 272.7883254092.

The spelling of 20299126 in words is "twenty million, two hundred ninety-nine thousand, one hundred twenty-six".