19967140 has 24 divisors (see below), whose sum is σ = 42158592. Its totient is φ = 7943520.

The previous prime is 19967111. The next prime is 19967173. The reversal of 19967140 is 4176991.

It is a self number, because there is not a number n which added to its sum of digits gives 19967140.

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, 1207 + ... + 6433.

It is an arithmetic number, because the mean of its divisors is an integer number (1756608).

Almost surely, 2^19967140 is an apocalyptic number.

19967140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19967140 is an abundant number, since it is smaller than the sum of its proper divisors (22191452).

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

19967140 is a wasteful number, since it uses less digits than its factorization.

19967140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5427 (or 5425 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 19967140 is about 4468.4605850337. The cubic root of 19967140 is about 271.2930205644.

The spelling of 19967140 in words is "nineteen million, nine hundred sixty-seven thousand, one hundred forty".