20299797 has 48 divisors (see below), whose sum is σ = 35642880. Its totient is φ = 10886400.

The previous prime is 20299789. The next prime is 20299831. The reversal of 20299797 is 79799202.

It is not a de Polignac number, because 20299797 - 2³ = 20299789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20299757) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 74772 + ... + 75042.

It is an arithmetic number, because the mean of its divisors is an integer number (742560).

Almost surely, 2^20299797 is an apocalyptic number.

It is an amenable number.

20299797 is a deficient number, since it is larger than the sum of its proper divisors (15343083).

20299797 is a wasteful number, since it uses less digits than its factorization.

20299797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 20299797 is about 4505.5296026106. The cubic root of 20299797 is about 272.7913311043.

It can be divided in two parts, 202 and 99797, that added together give a palindrome (99999).

The spelling of 20299797 in words is "twenty million, two hundred ninety-nine thousand, seven hundred ninety-seven".