20697929707 has 8 divisors (see below), whose sum is σ = 25474375136. Its totient is φ = 16376383872.

The previous prime is 20697929669. The next prime is 20697929719. The reversal of 20697929707 is 70792979602.

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

It is a cyclic number.

It is not a de Polignac number, because 20697929707 - 2¹⁹ = 20697405419 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20697929767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113724798 + ... + 113724979.

It is an arithmetic number, because the mean of its divisors is an integer number (3184296892).

Almost surely, 2^20697929707 is an apocalyptic number.

20697929707 is a deficient number, since it is larger than the sum of its proper divisors (4776445429).

20697929707 is a wasteful number, since it uses less digits than its factorization.

20697929707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227449797.

The product of its (nonzero) digits is 6001128, while the sum is 58.

The spelling of 20697929707 in words is "twenty billion, six hundred ninety-seven million, nine hundred twenty-nine thousand, seven hundred seven".