20155383 has 12 divisors (see below), whose sum is σ = 30379440. Its totient is φ = 12852576.

The previous prime is 20155367. The next prime is 20155411. The reversal of 20155383 is 38355102.

It is not a de Polignac number, because 20155383 - 2⁴ = 20155367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20155283) 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, 48478 + ... + 48891.

It is an arithmetic number, because the mean of its divisors is an integer number (2531620).

Almost surely, 2^20155383 is an apocalyptic number.

20155383 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

20155383 is a deficient number, since it is larger than the sum of its proper divisors (10224057).

20155383 is a wasteful number, since it uses less digits than its factorization.

20155383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97398 (or 97395 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 20155383 is about 4489.4746908742. The cubic root of 20155383 is about 272.1429062706.

It can be divided in two parts, 20 and 155383, that added together give a triangular number (155403 = T₅₅₇).

The spelling of 20155383 in words is "twenty million, one hundred fifty-five thousand, three hundred eighty-three".