135421918 has 4 divisors (see below), whose sum is σ = 203132880. Its totient is φ = 67710958.

The previous prime is 135421901. The next prime is 135421931. The reversal of 135421918 is 819124531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 819124531 = 61 ⋅13428271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33855478 + ... + 33855481.

It is an arithmetic number, because the mean of its divisors is an integer number (50783220).

Almost surely, 2^135421918 is an apocalyptic number.

135421918 is a deficient number, since it is larger than the sum of its proper divisors (67710962).

135421918 is an equidigital number, since it uses as much as digits as its factorization.

135421918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67710961.

The product of its digits is 8640, while the sum is 34.

The square root of 135421918 is about 11637.0923344279. The cubic root of 135421918 is about 513.5266501706.

The spelling of 135421918 in words is "one hundred thirty-five million, four hundred twenty-one thousand, nine hundred eighteen".