20761967 has 8 divisors (see below), whose sum is σ = 21005712. Its totient is φ = 20520000.

The previous prime is 20761963. The next prime is 20761973. The reversal of 20761967 is 76916702.

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 20761967 - 2² = 20761963 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20761967.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20761963) 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, 45203 + ... + 45659.

It is an arithmetic number, because the mean of its divisors is an integer number (2625714).

Almost surely, 2^20761967 is an apocalyptic number.

20761967 is a deficient number, since it is larger than the sum of its proper divisors (243745).

20761967 is a wasteful number, since it uses less digits than its factorization.

20761967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 889.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 20761967 is about 4556.5301491376. The cubic root of 20761967 is about 274.8460493686.

The spelling of 20761967 in words is "twenty million, seven hundred sixty-one thousand, nine hundred sixty-seven".