20933442 has 12 divisors (see below), whose sum is σ = 45355830. Its totient is φ = 6977808.

The previous prime is 20933399. The next prime is 20933449. The reversal of 20933442 is 24433902.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 20711601 + 221841 = 4551^2 + 471^2 .

It is not an unprimeable number, because it can be changed into a prime (20933449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 581467 + ... + 581502.

Almost surely, 2^20933442 is an apocalyptic number.

20933442 is an abundant number, since it is smaller than the sum of its proper divisors (24422388).

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

20933442 is a wasteful number, since it uses less digits than its factorization.

20933442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162977 (or 1162974 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 20933442 is about 4575.3078584943. The cubic root of 20933442 is about 275.6006353893.

The spelling of 20933442 in words is "twenty million, nine hundred thirty-three thousand, four hundred forty-two".