20011772 has 24 divisors (see below), whose sum is σ = 39139632. Its totient is φ = 8873600.

The previous prime is 20011763. The next prime is 20011781. The reversal of 20011772 is 27711002.

It is an interprime number because it is at equal distance from previous prime (20011763) and next prime (20011781).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3743 + ... + 7350.

It is an arithmetic number, because the mean of its divisors is an integer number (1630818).

Almost surely, 2^20011772 is an apocalyptic number.

20011772 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20011772 is a deficient number, since it is larger than the sum of its proper divisors (19127860).

20011772 is a wasteful number, since it uses less digits than its factorization.

20011772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11149 (or 11147 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 20.

The square root of 20011772 is about 4473.4519109967. The cubic root of 20011772 is about 271.4950080875.

Adding to 20011772 its reverse (27711002), we get a palindrome (47722774).

It can be divided in two parts, 2001 and 1772, that added together give a palindrome (3773).

The spelling of 20011772 in words is "twenty million, eleven thousand, seven hundred seventy-two".