20949552 has 180 divisors, whose sum is σ = 68787264. Its totient is φ = 5909760.

The previous prime is 20949547. The next prime is 20949563. The reversal of 20949552 is 25594902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 675777 + ... + 675807.

Almost surely, 2^20949552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20949552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34393632).

20949552 is an abundant number, since it is smaller than the sum of its proper divisors (47837712).

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

20949552 is a wasteful number, since it uses less digits than its factorization.

20949552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 20949552 is about 4577.0680571737. The cubic root of 20949552 is about 275.6713163561.

The spelling of 20949552 in words is "twenty million, nine hundred forty-nine thousand, five hundred fifty-two".