20409624124 has 6 divisors (see below), whose sum is σ = 35716842224. Its totient is φ = 10204812060.

The previous prime is 20409624119. The next prime is 20409624127. The reversal of 20409624124 is 42142690402.

It is a self number, because there is not a number n which added to its sum of digits gives 20409624124.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20409624127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551203012 + ... + 2551203019.

Almost surely, 2^20409624124 is an apocalyptic number.

It is an amenable number.

20409624124 is a deficient number, since it is larger than the sum of its proper divisors (15307218100).

20409624124 is a wasteful number, since it uses less digits than its factorization.

20409624124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102406035 (or 5102406033 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 20409624124 in words is "twenty billion, four hundred nine million, six hundred twenty-four thousand, one hundred twenty-four".