20011512 has 32 divisors (see below), whose sum is σ = 51194880. Its totient is φ = 6515040.

The previous prime is 20011507. The next prime is 20011529. The reversal of 20011512 is 21511002.

It is a super-2 number, since 2×20011512² = 800921225052288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

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, 8664 + ... + 10727.

It is an arithmetic number, because the mean of its divisors is an integer number (1599840).

Almost surely, 2^20011512 is an apocalyptic number.

It is an amenable number.

20011512 is an abundant number, since it is smaller than the sum of its proper divisors (31183368).

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

20011512 is a wasteful number, since it uses less digits than its factorization.

20011512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19443 (or 19439 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 20011512 is about 4473.4228505698. The cubic root of 20011512 is about 271.4938322962.

Adding to 20011512 its reverse (21511002), we get a palindrome (41522514).

The spelling of 20011512 in words is "twenty million, eleven thousand, five hundred twelve".