920019218 has 4 divisors (see below), whose sum is σ = 1380028830. Its totient is φ = 460009608.

The previous prime is 920019173. The next prime is 920019239. The reversal of 920019218 is 812910029.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 812910029 = 17 ⋅47818237.

It can be written as a sum of positive squares in only one way, i.e., 913429729 + 6589489 = 30223^2 + 2567^2 .

It is a super-2 number, since 2×920019218² = 1692870722978663048, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230004803 + ... + 230004806.

Almost surely, 2^920019218 is an apocalyptic number.

920019218 is a deficient number, since it is larger than the sum of its proper divisors (460009612).

920019218 is a wasteful number, since it uses less digits than its factorization.

920019218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460009611.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 920019218 is about 30331.8185739002. The cubic root of 920019218 is about 972.5955983500.

The spelling of 920019218 in words is "nine hundred twenty million, nineteen thousand, two hundred eighteen".