20739697136 has 40 divisors (see below), whose sum is σ = 40702503504. Its totient is φ = 10236441600.

The previous prime is 20739697129. The next prime is 20739697151. The reversal of 20739697136 is 63179693702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 525551 + ... + 563633.

Almost surely, 2^20739697136 is an apocalyptic number.

It is an amenable number.

20739697136 is a deficient number, since it is larger than the sum of its proper divisors (19962806368).

20739697136 is a wasteful number, since it uses less digits than its factorization.

20739697136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38529 (or 38523 counting only the distinct ones).

The product of its (nonzero) digits is 2571912, while the sum is 53.

The spelling of 20739697136 in words is "twenty billion, seven hundred thirty-nine million, six hundred ninety-seven thousand, one hundred thirty-six".