20400213020024 has 32 divisors (see below), whose sum is σ = 38831717053440. Its totient is φ = 10045403877600.

The previous prime is 20400213020009. The next prime is 20400213020093. The reversal of 20400213020024 is 42002031200402.

It is a junction number, because it is equal to n+sod(n) for n = 20400213019978 and 20400213020005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19194884 + ... + 20229779.

It is an arithmetic number, because the mean of its divisors is an integer number (1213491157920).

Almost surely, 2^{20400213020024} is an apocalyptic number.

It is an amenable number.

20400213020024 is a deficient number, since it is larger than the sum of its proper divisors (18431504033416).

20400213020024 is a wasteful number, since it uses less digits than its factorization.

20400213020024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39425651 (or 39425647 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 20400213020024 its reverse (42002031200402), we get a palindrome (62402244220426).

The spelling of 20400213020024 in words is "twenty trillion, four hundred billion, two hundred thirteen million, twenty thousand, twenty-four".