20446772 has 6 divisors (see below), whose sum is σ = 35781858. Its totient is φ = 10223384.

The previous prime is 20446729. The next prime is 20446799. The reversal of 20446772 is 27764402.

It can be written as a sum of positive squares in only one way, i.e., 13498276 + 6948496 = 3674^2 + 2636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2555843 + ... + 2555850.

It is an arithmetic number, because the mean of its divisors is an integer number (5963643).

Almost surely, 2^20446772 is an apocalyptic number.

It is an amenable number.

20446772 is a deficient number, since it is larger than the sum of its proper divisors (15335086).

20446772 is a wasteful number, since it uses less digits than its factorization.

20446772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5111697 (or 5111695 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 20446772 is about 4521.8106992664. The cubic root of 20446772 is about 273.4481050167.

The spelling of 20446772 in words is "twenty million, four hundred forty-six thousand, seven hundred seventy-two".