20628395 has 32 divisors (see below), whose sum is σ = 28226880. Its totient is φ = 14376960.

The previous prime is 20628379. The next prime is 20628397. The reversal of 20628395 is 59382602.

It is not a de Polignac number, because 20628395 - 2⁴ = 20628379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20628397) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85475 + ... + 85715.

It is an arithmetic number, because the mean of its divisors is an integer number (882090).

Almost surely, 2^20628395 is an apocalyptic number.

20628395 is a deficient number, since it is larger than the sum of its proper divisors (7598485).

20628395 is a wasteful number, since it uses less digits than its factorization.

20628395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20628395 is about 4541.8492929643. The cubic root of 20628395 is about 274.2553740027.

The spelling of 20628395 in words is "twenty million, six hundred twenty-eight thousand, three hundred ninety-five".