20212549 has 12 divisors (see below), whose sum is σ = 24088428. Its totient is φ = 16900800.

The previous prime is 20212547. The next prime is 20212559. The reversal of 20212549 is 94521202.

It can be written as a sum of positive squares in 2 ways, for example, as 5336100 + 14876449 = 2310^2 + 3857^2 .

It is not a de Polignac number, because 20212549 - 2¹ = 20212547 is a prime.

It is a super-3 number, since 3×20212549³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20212547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3022 + ... + 7039.

It is an arithmetic number, because the mean of its divisors is an integer number (2007369).

Almost surely, 2^20212549 is an apocalyptic number.

It is an amenable number.

20212549 is a deficient number, since it is larger than the sum of its proper divisors (3875879).

20212549 is a wasteful number, since it uses less digits than its factorization.

20212549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10116 (or 10109 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 20212549 is about 4495.8368520221. The cubic root of 20212549 is about 272.3999531727.

The spelling of 20212549 in words is "twenty million, two hundred twelve thousand, five hundred forty-nine".