20201197766 has 8 divisors (see below), whose sum is σ = 31120764240. Its totient is φ = 9827609688.

The previous prime is 20201197763. The next prime is 20201197769. The reversal of 20201197766 is 66779110202.

It is an interprime number because it is at equal distance from previous prime (20201197763) and next prime (20201197769).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201197763) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136494506 + ... + 136494653.

It is an arithmetic number, because the mean of its divisors is an integer number (3890095530).

Almost surely, 2^20201197766 is an apocalyptic number.

20201197766 is a deficient number, since it is larger than the sum of its proper divisors (10919566474).

20201197766 is a wasteful number, since it uses less digits than its factorization.

20201197766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272989198.

The product of its (nonzero) digits is 63504, while the sum is 41.

The spelling of 20201197766 in words is "twenty billion, two hundred one million, one hundred ninety-seven thousand, seven hundred sixty-six".