20401695 has 12 divisors (see below), whose sum is σ = 35363016. Its totient is φ = 10880880.

The previous prime is 20401691. The next prime is 20401709. The reversal of 20401695 is 59610402.

It is not a de Polignac number, because 20401695 - 2² = 20401691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401691) 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, 226641 + ... + 226730.

It is an arithmetic number, because the mean of its divisors is an integer number (2946918).

Almost surely, 2^20401695 is an apocalyptic number.

20401695 is a deficient number, since it is larger than the sum of its proper divisors (14961321).

20401695 is a wasteful number, since it uses less digits than its factorization.

20401695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453382 (or 453379 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20401695 is about 4516.8235520109. The cubic root of 20401695 is about 273.2470090609.

The spelling of 20401695 in words is "twenty million, four hundred one thousand, six hundred ninety-five".