20402434124 has 12 divisors (see below), whose sum is σ = 35710758384. Its totient is φ = 10199360304.

The previous prime is 20402434093. The next prime is 20402434201. The reversal of 20402434124 is 42143420402.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20402434093 and 20402434102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439319 + ... + 483534.

It is an arithmetic number, because the mean of its divisors is an integer number (2975896532).

Almost surely, 2^20402434124 is an apocalyptic number.

It is an amenable number.

20402434124 is a deficient number, since it is larger than the sum of its proper divisors (15308324260).

20402434124 is a wasteful number, since it uses less digits than its factorization.

20402434124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928384 (or 928382 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 20402434124 its reverse (42143420402), we get a palindrome (62545854526).

The spelling of 20402434124 in words is "twenty billion, four hundred two million, four hundred thirty-four thousand, one hundred twenty-four".