20338477 has 8 divisors (see below), whose sum is σ = 21647736. Its totient is φ = 19041792.

The previous prime is 20338469. The next prime is 20338481. The reversal of 20338477 is 77483302.

It can be written as a sum of positive squares in 4 ways, for example, as 16152361 + 4186116 = 4019^2 + 2046^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20338477 - 2³ = 20338469 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 (20338777) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313 + ... + 6385.

It is an arithmetic number, because the mean of its divisors is an integer number (2705967).

Almost surely, 2^20338477 is an apocalyptic number.

It is an amenable number.

20338477 is a deficient number, since it is larger than the sum of its proper divisors (1309259).

20338477 is a wasteful number, since it uses less digits than its factorization.

20338477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6287.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 20338477 is about 4509.8200629293. The cubic root of 20338477 is about 272.9644834760.

The spelling of 20338477 in words is "twenty million, three hundred thirty-eight thousand, four hundred seventy-seven".