20707798 has 8 divisors (see below), whose sum is σ = 32132880. Its totient is φ = 9996840.

The previous prime is 20707781. The next prime is 20707801. The reversal of 20707798 is 89770702.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20707798.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178458 + ... + 178573.

It is an arithmetic number, because the mean of its divisors is an integer number (4016610).

Almost surely, 2^20707798 is an apocalyptic number.

20707798 is a deficient number, since it is larger than the sum of its proper divisors (11425082).

20707798 is a wasteful number, since it uses less digits than its factorization.

20707798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357062.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 20707798 is about 4550.5821605592. The cubic root of 20707798 is about 274.6068122030.

The spelling of 20707798 in words is "twenty million, seven hundred seven thousand, seven hundred ninety-eight".