20299906 has 16 divisors (see below), whose sum is σ = 33310368. Its totient is φ = 9201600.

The previous prime is 20299883. The next prime is 20299927. The reversal of 20299906 is 60999202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8461 + ... + 10591.

It is an arithmetic number, because the mean of its divisors is an integer number (2081898).

Almost surely, 2^20299906 is an apocalyptic number.

20299906 is a deficient number, since it is larger than the sum of its proper divisors (13010462).

20299906 is a wasteful number, since it uses less digits than its factorization.

20299906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 20299906 is about 4505.5416988415. The cubic root of 20299906 is about 272.7918193555.

It can be divided in two parts, 2029 and 9906, that added together give a triangular number (11935 = T₁₅₄).

The spelling of 20299906 in words is "twenty million, two hundred ninety-nine thousand, nine hundred six".