20520352432 has 10 divisors (see below), whose sum is σ = 39758182868. Its totient is φ = 10260176208.

The previous prime is 20520352429. The next prime is 20520352483. The reversal of 20520352432 is 23425302502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20520352432.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 641260998 + ... + 641261029.

Almost surely, 2^20520352432 is an apocalyptic number.

It is an amenable number.

20520352432 is a deficient number, since it is larger than the sum of its proper divisors (19237830436).

20520352432 is a wasteful number, since it uses less digits than its factorization.

20520352432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282522035 (or 1282522029 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 28.

Adding to 20520352432 its reverse (23425302502), we get a palindrome (43945654934).

The spelling of 20520352432 in words is "twenty billion, five hundred twenty million, three hundred fifty-two thousand, four hundred thirty-two".