20246724 has 18 divisors (see below), whose sum is σ = 51179310. Its totient is φ = 6748896.

The previous prime is 20246701. The next prime is 20246729. The reversal of 20246724 is 42764202.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11778624 + 8468100 = 3432^2 + 2910^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (20246729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 281169 + ... + 281240.

It is an arithmetic number, because the mean of its divisors is an integer number (2843295).

Almost surely, 2^20246724 is an apocalyptic number.

It is an amenable number.

20246724 is an abundant number, since it is smaller than the sum of its proper divisors (30932586).

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

20246724 is a wasteful number, since it uses less digits than its factorization.

20246724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562419 (or 562414 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 20246724 is about 4499.6359852770. The cubic root of 20246724 is about 272.5533896455.

The spelling of 20246724 in words is "twenty million, two hundred forty-six thousand, seven hundred twenty-four".