20378699 has 12 divisors (see below), whose sum is σ = 23719752. Its totient is φ = 17434560.

The previous prime is 20378663. The next prime is 20378707. The reversal of 20378699 is 99687302.

It is not a de Polignac number, because 20378699 - 2¹² = 20374603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20378629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2897 + ... + 7010.

It is an arithmetic number, because the mean of its divisors is an integer number (1976646).

Almost surely, 2^20378699 is an apocalyptic number.

20378699 is a deficient number, since it is larger than the sum of its proper divisors (3341053).

20378699 is a wasteful number, since it uses less digits than its factorization.

20378699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9946 (or 9935 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 20378699 is about 4514.2772400463. The cubic root of 20378699 is about 273.1443059836.

The spelling of 20378699 in words is "twenty million, three hundred seventy-eight thousand, six hundred ninety-nine".