20134431650 has 48 divisors (see below), whose sum is σ = 38173849128. Its totient is φ = 7898880000.

The previous prime is 20134431631. The next prime is 20134431697. The reversal of 20134431650 is 5613443102.

It can be written as a sum of positive squares in 12 ways, for example, as 1510643689 + 18623787961 = 38867^2 + 136469^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1067300 + ... + 1086000.

Almost surely, 2^20134431650 is an apocalyptic number.

20134431650 is a deficient number, since it is larger than the sum of its proper divisors (18039417478).

20134431650 is a wasteful number, since it uses less digits than its factorization.

20134431650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19127 (or 19122 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

Adding to 20134431650 its reverse (5613443102), we get a palindrome (25747874752).

The spelling of 20134431650 in words is "twenty billion, one hundred thirty-four million, four hundred thirty-one thousand, six hundred fifty".