19121630 has 24 divisors (see below), whose sum is σ = 37834776. Its totient is φ = 6952880.

The previous prime is 19121629. The next prime is 19121653. The reversal of 19121630 is 3612191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19121596 and 19121605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6692 + ... + 9111.

It is an arithmetic number, because the mean of its divisors is an integer number (1576449).

Almost surely, 2^19121630 is an apocalyptic number.

19121630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19121630 is a deficient number, since it is larger than the sum of its proper divisors (18713146).

19121630 is a wasteful number, since it uses less digits than its factorization.

19121630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15832 (or 15821 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 19121630 is about 4372.8286040045. The cubic root of 19121630 is about 267.4083536170.

The spelling of 19121630 in words is "nineteen million, one hundred twenty-one thousand, six hundred thirty".