19212940 has 12 divisors (see below), whose sum is σ = 40347216. Its totient is φ = 7685168.

The previous prime is 19212931. The next prime is 19212961. The reversal of 19212940 is 4921291.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19212899 and 19212908.

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, 480304 + ... + 480343.

It is an arithmetic number, because the mean of its divisors is an integer number (3362268).

Almost surely, 2^19212940 is an apocalyptic number.

19212940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19212940 is an abundant number, since it is smaller than the sum of its proper divisors (21134276).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19212940 is a wasteful number, since it uses less digits than its factorization.

19212940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 960656 (or 960654 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 19212940 is about 4383.2567800666. The cubic root of 19212940 is about 267.8333225124.

It can be divided in two parts, 192129 and 40, that multiplied together give a triangular number (7685160 = T₃₉₂₀).

The spelling of 19212940 in words is "nineteen million, two hundred twelve thousand, nine hundred forty".