20213492 has 48 divisors (see below), whose sum is σ = 41160000. Its totient is φ = 8605440.

The previous prime is 20213471. The next prime is 20213497. The reversal of 20213492 is 29431202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213497) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40259 + ... + 40757.

It is an arithmetic number, because the mean of its divisors is an integer number (857500).

Almost surely, 2^20213492 is an apocalyptic number.

It is an amenable number.

20213492 is an abundant number, since it is smaller than the sum of its proper divisors (20946508).

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

20213492 is a wasteful number, since it uses less digits than its factorization.

20213492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 20213492 is about 4495.9417256010. The cubic root of 20213492 is about 272.4041893061.

Adding to 20213492 its reverse (29431202), we get a palindrome (49644694).

The spelling of 20213492 in words is "twenty million, two hundred thirteen thousand, four hundred ninety-two".