1918214953 has 8 divisors (see below), whose sum is σ = 1953939240. Its totient is φ = 1882805760.

The previous prime is 1918214923. The next prime is 1918214957. The reversal of 1918214953 is 3594128191.

It can be written as a sum of positive squares in 4 ways, for example, as 563017984 + 1355196969 = 23728^2 + 36813^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1918214953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1918214957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66468 + ... + 90853.

It is an arithmetic number, because the mean of its divisors is an integer number (244242405).

Almost surely, 2^1918214953 is an apocalyptic number.

It is an amenable number.

1918214953 is a deficient number, since it is larger than the sum of its proper divisors (35724287).

1918214953 is a wasteful number, since it uses less digits than its factorization.

1918214953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157547.

The product of its digits is 77760, while the sum is 43.

The square root of 1918214953 is about 43797.4308949737. The cubic root of 1918214953 is about 1242.5077054474.

The spelling of 1918214953 in words is "one billion, nine hundred eighteen million, two hundred fourteen thousand, nine hundred fifty-three".