19709412 has 12 divisors (see below), whose sum is σ = 45988656. Its totient is φ = 6569800.

The previous prime is 19709411. The next prime is 19709423. The reversal of 19709412 is 21490791.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (19709411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 821214 + ... + 821237.

It is an arithmetic number, because the mean of its divisors is an integer number (3832388).

Almost surely, 2^19709412 is an apocalyptic number.

19709412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19709412 is an abundant number, since it is smaller than the sum of its proper divisors (26279244).

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

19709412 is a wasteful number, since it uses less digits than its factorization.

19709412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1642458 (or 1642456 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 19709412 is about 4439.5283533276. The cubic root of 19709412 is about 270.1207141975.

The spelling of 19709412 in words is "nineteen million, seven hundred nine thousand, four hundred twelve".