20401363 has 4 divisors (see below), whose sum is σ = 20419168. Its totient is φ = 20383560.

The previous prime is 20401361. The next prime is 20401397. The reversal of 20401363 is 36310402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20401363 - 2¹ = 20401361 is a prime.

It is a super-2 number, since 2×20401363² = 832431224515538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20401363.

It is not an unprimeable number, because it can be changed into a prime (20401361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7056 + ... + 9517.

It is an arithmetic number, because the mean of its divisors is an integer number (5104792).

Almost surely, 2^20401363 is an apocalyptic number.

20401363 is a deficient number, since it is larger than the sum of its proper divisors (17805).

20401363 is a wasteful number, since it uses less digits than its factorization.

20401363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17804.

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 20401363 is about 4516.7868003704. The cubic root of 20401363 is about 273.2455268556.

Adding to 20401363 its reverse (36310402), we get a palindrome (56711765).

It can be divided in two parts, 2040 and 1363, that added together give a triangular number (3403 = T₈₂).

The spelling of 20401363 in words is "twenty million, four hundred one thousand, three hundred sixty-three".