20219012 has 12 divisors (see below), whose sum is σ = 38600016. Its totient is φ = 9190440.

The previous prime is 20219011. The next prime is 20219033. The reversal of 20219012 is 21091202.

It is a super-2 number, since 2×20219012² = 817616892512288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20219011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 229718 + ... + 229805.

It is an arithmetic number, because the mean of its divisors is an integer number (3216668).

Almost surely, 2^20219012 is an apocalyptic number.

20219012 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20219012 is a deficient number, since it is larger than the sum of its proper divisors (18381004).

20219012 is a wasteful number, since it uses less digits than its factorization.

20219012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459538 (or 459536 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 20219012 is about 4496.5555706563. Note that the first 4 decimals coincide. The cubic root of 20219012 is about 272.4289835420.

It can be divided in two parts, 202190 and 12, that added together give a palindrome (202202).

The spelling of 20219012 in words is "twenty million, two hundred nineteen thousand, twelve".