20381342553 has 120 divisors (see below), whose sum is σ = 36980209728. Its totient is φ = 11028312000.

The previous prime is 20381342539. The next prime is 20381342563. The reversal of 20381342553 is 35524318302.

20381342553 is a `hidden beast` number, since 20 + 3 + 81 + 3 + 4 + 2 + 553 = 666.

It is not a de Polignac number, because 20381342553 - 2¹⁰ = 20381341529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20381342533) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 11130348 + ... + 11132178.

Almost surely, 2^20381342553 is an apocalyptic number.

It is an amenable number.

20381342553 is a deficient number, since it is larger than the sum of its proper divisors (16598867175).

20381342553 is a wasteful number, since it uses less digits than its factorization.

20381342553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The spelling of 20381342553 in words is "twenty billion, three hundred eighty-one million, three hundred forty-two thousand, five hundred fifty-three".