19941516 has 36 divisors (see below), whose sum is σ = 57609552. Its totient is φ = 5697504.

The previous prime is 19941491. The next prime is 19941517. The reversal of 19941516 is 61514991.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (19941517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39315 + ... + 39818.

Almost surely, 2^19941516 is an apocalyptic number.

It is an amenable number.

19941516 is an abundant number, since it is smaller than the sum of its proper divisors (37668036).

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

19941516 is a wasteful number, since it uses less digits than its factorization.

19941516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79150 (or 79145 counting only the distinct ones).

The product of its digits is 9720, while the sum is 36.

The square root of 19941516 is about 4465.5924578940. The cubic root of 19941516 is about 271.1769200084.

The spelling of 19941516 in words is "nineteen million, nine hundred forty-one thousand, five hundred sixteen".