20487772 has 6 divisors (see below), whose sum is σ = 35853608. Its totient is φ = 10243884.

The previous prime is 20487763. The next prime is 20487773. The reversal of 20487772 is 27778402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20487773) by changing a digit.

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 as a sum of consecutive naturals, namely, 2560968 + ... + 2560975.

Almost surely, 2^20487772 is an apocalyptic number.

It is an amenable number.

20487772 is a deficient number, since it is larger than the sum of its proper divisors (15365836).

20487772 is a wasteful number, since it uses less digits than its factorization.

20487772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5121947 (or 5121945 counting only the distinct ones).

The product of its (nonzero) digits is 43904, while the sum is 37.

The square root of 20487772 is about 4526.3420109400. The cubic root of 20487772 is about 273.6307562919.

The spelling of 20487772 in words is "twenty million, four hundred eighty-seven thousand, seven hundred seventy-two".