20251151212666 has 16 divisors (see below), whose sum is σ = 33138756857088. Its totient is φ = 9204927228000.

The previous prime is 20251151212627. The next prime is 20251151212687. The reversal of 20251151212666 is 66621215115202.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5604810 + ... + 8480341.

It is an arithmetic number, because the mean of its divisors is an integer number (2071172303568).

Almost surely, 2^{20251151212666} is an apocalyptic number.

20251151212666 is a deficient number, since it is larger than the sum of its proper divisors (12887605644422).

20251151212666 is a wasteful number, since it uses less digits than its factorization.

20251151212666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14150517.

The product of its (nonzero) digits is 86400, while the sum is 40.

Adding to 20251151212666 its reverse (66621215115202), we get a palindrome (86872366327868).

The spelling of 20251151212666 in words is "twenty trillion, two hundred fifty-one billion, one hundred fifty-one million, two hundred twelve thousand, six hundred sixty-six".