20769687 has 12 divisors (see below), whose sum is σ = 30193800. Its totient is φ = 13757328.

The previous prime is 20769649. The next prime is 20769689. The reversal of 20769687 is 78696702.

It is a happy number.

It is not a de Polignac number, because 20769687 - 2¹⁴ = 20753303 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20769689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5937 + ... + 8762.

It is an arithmetic number, because the mean of its divisors is an integer number (2516150).

Almost surely, 2^20769687 is an apocalyptic number.

20769687 is a deficient number, since it is larger than the sum of its proper divisors (9424113).

20769687 is a wasteful number, since it uses less digits than its factorization.

20769687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14862 (or 14859 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 20769687 is about 4557.3772062448. The cubic root of 20769687 is about 274.8801108260.

The spelling of 20769687 in words is "twenty million, seven hundred sixty-nine thousand, six hundred eighty-seven".