1903817138 has 16 divisors (see below), whose sum is σ = 3007221120. Its totient is φ = 901449936.

The previous prime is 1903817101. The next prime is 1903817141. The reversal of 1903817138 is 8317183091.

It is a super-2 number, since 2×1903817138² = 7249039389885022088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1903817095 and 1903817104.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103895 + ... + 120837.

It is an arithmetic number, because the mean of its divisors is an integer number (187951320).

Almost surely, 2^1903817138 is an apocalyptic number.

1903817138 is a deficient number, since it is larger than the sum of its proper divisors (1103403982).

1903817138 is a wasteful number, since it uses less digits than its factorization.

1903817138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19921.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 1903817138 is about 43632.7530417231. The cubic root of 1903817138 is about 1239.3912069645.

The spelling of 1903817138 in words is "one billion, nine hundred three million, eight hundred seventeen thousand, one hundred thirty-eight".