20387398 has 8 divisors (see below), whose sum is σ = 31567680. Its totient is φ = 9864840.

The previous prime is 20387387. The next prime is 20387401. The reversal of 20387398 is 89378302.

It is a happy number.

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 20387398.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164353 + ... + 164476.

It is an arithmetic number, because the mean of its divisors is an integer number (3945960).

Almost surely, 2^20387398 is an apocalyptic number.

20387398 is a deficient number, since it is larger than the sum of its proper divisors (11180282).

20387398 is a wasteful number, since it uses less digits than its factorization.

20387398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328862.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 20387398 is about 4515.2406358908. The cubic root of 20387398 is about 273.1831659113.

The spelling of 20387398 in words is "twenty million, three hundred eighty-seven thousand, three hundred ninety-eight".