16421964 has 24 divisors (see below), whose sum is σ = 41265840. Its totient is φ = 5052864.

The previous prime is 16421963. The next prime is 16422019. The reversal of 16421964 is 46912461.

16421964 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (16421963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52479 + ... + 52790.

It is an arithmetic number, because the mean of its divisors is an integer number (1719410).

Almost surely, 2^16421964 is an apocalyptic number.

It is an amenable number.

16421964 is an abundant number, since it is smaller than the sum of its proper divisors (24843876).

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

16421964 is a wasteful number, since it uses less digits than its factorization.

16421964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105289 (or 105287 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 16421964 is about 4052.4022505176. The cubic root of 16421964 is about 254.1801891698.

The spelling of 16421964 in words is "sixteen million, four hundred twenty-one thousand, nine hundred sixty-four".