20398702 has 8 divisors (see below), whose sum is σ = 30735936. Its totient is φ = 10153392.

The previous prime is 20398699. The next prime is 20398709. The reversal of 20398702 is 20789302.

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

It is a super-2 number, since 2×20398702² = 832214086569608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20398709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22423 + ... + 23314.

It is an arithmetic number, because the mean of its divisors is an integer number (3841992).

Almost surely, 2^20398702 is an apocalyptic number.

20398702 is a deficient number, since it is larger than the sum of its proper divisors (10337234).

20398702 is a wasteful number, since it uses less digits than its factorization.

20398702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45962.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20398702 is about 4516.4922229536. The cubic root of 20398702 is about 273.2336463101.

The spelling of 20398702 in words is "twenty million, three hundred ninety-eight thousand, seven hundred two".