21741522 has 24 divisors (see below), whose sum is σ = 47797008. Its totient is φ = 6588120.

The previous prime is 21741493. The next prime is 21741523. The reversal of 21741522 is 22514712.

It is a junction number, because it is equal to n+sod(n) for n = 21741492 and 21741501.

It is not an unprimeable number, because it can be changed into a prime (21741523) 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, 14248 + ... + 15699.

It is an arithmetic number, because the mean of its divisors is an integer number (1991542).

Almost surely, 2^21741522 is an apocalyptic number.

21741522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21741522 is an abundant number, since it is smaller than the sum of its proper divisors (26055486).

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

21741522 is a wasteful number, since it uses less digits than its factorization.

21741522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29974 (or 29963 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 21741522 is about 4662.7805009458. The cubic root of 21741522 is about 279.1022351143.

The spelling of 21741522 in words is "twenty-one million, seven hundred forty-one thousand, five hundred twenty-two".