20154667016642 has 24 divisors (see below), whose sum is σ = 30846694264308. Its totient is φ = 9876346441920.

The previous prime is 20154667016597. The next prime is 20154667016651. The reversal of 20154667016642 is 24661076645102.

It can be written as a sum of positive squares in 6 ways, for example, as 569784935281 + 19584882081361 = 754841^2 + 4425481^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2827073 + ... + 6949940.

Almost surely, 2^{20154667016642} is an apocalyptic number.

20154667016642 is a deficient number, since it is larger than the sum of its proper divisors (10692027247666).

20154667016642 is an equidigital number, since it uses as much as digits as its factorization.

20154667016642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9777414 (or 9777353 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 20154667016642 in words is "twenty trillion, one hundred fifty-four billion, six hundred sixty-seven million, sixteen thousand, six hundred forty-two".