20549672 has 96 divisors (see below), whose sum is σ = 48263040. Its totient is φ = 8131200.

The previous prime is 20549663. The next prime is 20549677. The reversal of 20549672 is 27694502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20549677) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289397 + ... + 289467.

It is an arithmetic number, because the mean of its divisors is an integer number (502740).

Almost surely, 2^20549672 is an apocalyptic number.

20549672 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20549672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24131520).

20549672 is an abundant number, since it is smaller than the sum of its proper divisors (27713368).

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

20549672 is a wasteful number, since it uses less digits than its factorization.

20549672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135 (or 120 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 20549672 is about 4533.1746050643. The cubic root of 20549672 is about 273.9060540696.

The spelling of 20549672 in words is "twenty million, five hundred forty-nine thousand, six hundred seventy-two".