19121012 has 12 divisors (see below), whose sum is σ = 33560100. Its totient is φ = 9532416.

The previous prime is 19120987. The next prime is 19121029. The reversal of 19121012 is 21012191.

It can be written as a sum of positive squares in 2 ways, for example, as 5973136 + 13147876 = 2444^2 + 3626^2 .

It is a super-2 number, since 2×19121012² = 731226199808288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5453 + ... + 8244.

It is an arithmetic number, because the mean of its divisors is an integer number (2796675).

Almost surely, 2^19121012 is an apocalyptic number.

It is an amenable number.

19121012 is a deficient number, since it is larger than the sum of its proper divisors (14439088).

19121012 is a wasteful number, since it uses less digits than its factorization.

19121012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14050 (or 14048 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 19121012 is about 4372.7579397904. The cubic root of 19121012 is about 267.4054727583.

The spelling of 19121012 in words is "nineteen million, one hundred twenty-one thousand, twelve".