20012772 has 24 divisors (see below), whose sum is σ = 50288896. Its totient is φ = 6157728.

The previous prime is 20012771. The next prime is 20012801. The reversal of 20012772 is 27721002.

It is a super-2 number, since 2×20012772² = 801022086247968, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20012771) 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 in 7 ways as a sum of consecutive naturals, for example, 63988 + ... + 64299.

Almost surely, 2^20012772 is an apocalyptic number.

It is an amenable number.

20012772 is an abundant number, since it is smaller than the sum of its proper divisors (30276124).

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

20012772 is a wasteful number, since it uses less digits than its factorization.

20012772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128307 (or 128305 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 20012772 is about 4473.5636801101. The cubic root of 20012772 is about 271.4995302672.

Adding to 20012772 its reverse (27721002), we get a palindrome (47733774).

The spelling of 20012772 in words is "twenty million, twelve thousand, seven hundred seventy-two".