20383551 has 6 divisors (see below), whose sum is σ = 29442920. Its totient is φ = 13589028.

The previous prime is 20383541. The next prime is 20383553. The reversal of 20383551 is 15538302.

It is not a de Polignac number, because 20383551 - 2¹³ = 20375359 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 (20383553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1132411 + ... + 1132428.

Almost surely, 2^20383551 is an apocalyptic number.

20383551 is a deficient number, since it is larger than the sum of its proper divisors (9059369).

20383551 is a wasteful number, since it uses less digits than its factorization.

20383551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2264845 (or 2264842 counting only the distinct ones).

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

The square root of 20383551 is about 4514.8146141342. The cubic root of 20383551 is about 273.1659820649.

The spelling of 20383551 in words is "twenty million, three hundred eighty-three thousand, five hundred fifty-one".