21619052 has 24 divisors (see below), whose sum is σ = 46564896. Its totient is φ = 8552448.

The previous prime is 21619051. The next prime is 21619109. The reversal of 21619052 is 25091612.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (21619051) 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, 29333 + ... + 30060.

It is an arithmetic number, because the mean of its divisors is an integer number (1940204).

Almost surely, 2^21619052 is an apocalyptic number.

It is an amenable number.

21619052 is an abundant number, since it is smaller than the sum of its proper divisors (24945844).

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

21619052 is a wasteful number, since it uses less digits than its factorization.

21619052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59417 (or 59415 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 21619052 is about 4649.6292325303. The cubic root of 21619052 is about 278.5771870198.

The spelling of 21619052 in words is "twenty-one million, six hundred nineteen thousand, fifty-two".