20605193424 has 50 divisors (see below), whose sum is σ = 59637411570. Its totient is φ = 6868397376.

The previous prime is 20605193423. The next prime is 20605193431. The reversal of 20605193424 is 42439150602.

It is a happy number.

20605193424 is a `hidden beast` number, since 2 + 0 + 605 + 1 + 9 + 3 + 42 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 16452679824 + 4152513600 = 128268^2 + 64440^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20605193423) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7948239 + ... + 7950830.

Almost surely, 2^20605193424 is an apocalyptic number.

20605193424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20605193424 is an abundant number, since it is smaller than the sum of its proper divisors (39032218146).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20605193424 is a wasteful number, since it uses less digits than its factorization.

20605193424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15899089 (or 15899074 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The spelling of 20605193424 in words is "twenty billion, six hundred five million, one hundred ninety-three thousand, four hundred twenty-four".