20201151566 has 8 divisors (see below), whose sum is σ = 30313131240. Its totient is φ = 10096774488.

The previous prime is 20201151517. The next prime is 20201151583. The reversal of 20201151566 is 66515110202.

It is a happy number.

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

It is a congruent number.

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, 1894001 + ... + 1904636.

It is an arithmetic number, because the mean of its divisors is an integer number (3789141405).

Almost surely, 2^20201151566 is an apocalyptic number.

20201151566 is a deficient number, since it is larger than the sum of its proper divisors (10111979674).

20201151566 is a wasteful number, since it uses less digits than its factorization.

20201151566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3801298.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 20201151566 its reverse (66515110202), we get a palindrome (86716261768).

The spelling of 20201151566 in words is "twenty billion, two hundred one million, one hundred fifty-one thousand, five hundred sixty-six".