20954975151 has 64 divisors (see below), whose sum is σ = 32693414400. Its totient is φ = 11805235200.

The previous prime is 20954975147. The next prime is 20954975203. The reversal of 20954975151 is 15157945902.

It is not a de Polignac number, because 20954975151 - 2² = 20954975147 is a prime.

It is a super-2 number, since 2×20954975151² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20954975151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20954976151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7643641 + ... + 7646381.

It is an arithmetic number, because the mean of its divisors is an integer number (510834600).

Almost surely, 2^20954975151 is an apocalyptic number.

20954975151 is a deficient number, since it is larger than the sum of its proper divisors (11738439249).

20954975151 is a wasteful number, since it uses less digits than its factorization.

20954975151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3000.

The product of its (nonzero) digits is 567000, while the sum is 48.

The spelling of 20954975151 in words is "twenty billion, nine hundred fifty-four million, nine hundred seventy-five thousand, one hundred fifty-one".