20409624193 has 24 divisors (see below), whose sum is σ = 26082228800. Its totient is φ = 15598303488.

The previous prime is 20409624127. The next prime is 20409624203. The reversal of 20409624193 is 39142690402.

It is not a de Polignac number, because 20409624193 - 2¹⁷ = 20409493121 is a prime.

It is a super-4 number, since 4×20409624193⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20409624293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 227058 + ... + 303931.

Almost surely, 2^20409624193 is an apocalyptic number.

It is an amenable number.

20409624193 is a deficient number, since it is larger than the sum of its proper divisors (5672604607).

20409624193 is a wasteful number, since it uses less digits than its factorization.

20409624193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531049 (or 531032 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 20409624193 in words is "twenty billion, four hundred nine million, six hundred twenty-four thousand, one hundred ninety-three".