20405013424 has 10 divisors (see below), whose sum is σ = 39534713540. Its totient is φ = 10202506704.

The previous prime is 20405013407. The next prime is 20405013439. The reversal of 20405013424 is 42431050402.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637656654 + ... + 637656685.

It is an arithmetic number, because the mean of its divisors is an integer number (3953471354).

Almost surely, 2^20405013424 is an apocalyptic number.

It is an amenable number.

20405013424 is a deficient number, since it is larger than the sum of its proper divisors (19129700116).

20405013424 is a wasteful number, since it uses less digits than its factorization.

20405013424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1275313347 (or 1275313341 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

Adding to 20405013424 its reverse (42431050402), we get a palindrome (62836063826).

The spelling of 20405013424 in words is "twenty billion, four hundred five million, thirteen thousand, four hundred twenty-four".