20705751938 has 8 divisors (see below), whose sum is σ = 31062733632. Its totient is φ = 10351507396.

The previous prime is 20705751893. The next prime is 20705751971. The reversal of 20705751938 is 83915750702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 20705751892 and 20705751901.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665270 + ... + 695697.

It is an arithmetic number, because the mean of its divisors is an integer number (3882841704).

Almost surely, 2^20705751938 is an apocalyptic number.

20705751938 is a deficient number, since it is larger than the sum of its proper divisors (10356981694).

20705751938 is a wasteful number, since it uses less digits than its factorization.

20705751938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1368576.

The product of its (nonzero) digits is 529200, while the sum is 47.

The spelling of 20705751938 in words is "twenty billion, seven hundred five million, seven hundred fifty-one thousand, nine hundred thirty-eight".