18951045143 has 2 divisors, whose sum is σ = 18951045144. Its totient is φ = 18951045142.

The previous prime is 18951045119. The next prime is 18951045173. The reversal of 18951045143 is 34154015981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 18951045143 - 2³² = 14656077847 is a prime.

It is a super-2 number, since 2×18951045143² (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 18951045143.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18951045173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9475522571 + 9475522572.

It is an arithmetic number, because the mean of its divisors is an integer number (9475522572).

Almost surely, 2^18951045143 is an apocalyptic number.

18951045143 is a deficient number, since it is larger than the sum of its proper divisors (1).

18951045143 is an equidigital number, since it uses as much as digits as its factorization.

18951045143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 41.

The spelling of 18951045143 in words is "eighteen billion, nine hundred fifty-one million, forty-five thousand, one hundred forty-three".