20449442 has 16 divisors (see below), whose sum is σ = 33280632. Its totient is φ = 9367680.

The previous prime is 20449433. The next prime is 20449469. The reversal of 20449442 is 24494402.

It can be written as a sum of positive squares in 4 ways, for example, as 14969161 + 5480281 = 3869^2 + 2341^2 .

It is a super-2 number, since 2×20449442² = 836359356222728, which contains 22 as substring.

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, 692 + ... + 6432.

Almost surely, 2^20449442 is an apocalyptic number.

20449442 is a deficient number, since it is larger than the sum of its proper divisors (12831190).

20449442 is a wasteful number, since it uses less digits than its factorization.

20449442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5893.

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 20449442 is about 4522.1059253405. The cubic root of 20449442 is about 273.4600070529.

The spelling of 20449442 in words is "twenty million, four hundred forty-nine thousand, four hundred forty-two".