20195477 has 16 divisors (see below), whose sum is σ = 21676032. Its totient is φ = 18784560.

The previous prime is 20195471. The next prime is 20195479. The reversal of 20195477 is 77459102.

It is not a de Polignac number, because 20195477 - 2⁸ = 20195221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20195471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120848 + ... + 121014.

It is an arithmetic number, because the mean of its divisors is an integer number (1354752).

Almost surely, 2^20195477 is an apocalyptic number.

It is an amenable number.

20195477 is a deficient number, since it is larger than the sum of its proper divisors (1480555).

20195477 is a wasteful number, since it uses less digits than its factorization.

20195477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 20195477 is about 4493.9378055331. The cubic root of 20195477 is about 272.3232397426.

The spelling of 20195477 in words is "twenty million, one hundred ninety-five thousand, four hundred seventy-seven".