20512492 has 96 divisors (see below), whose sum is σ = 49674240. Its totient is φ = 7153920.

The previous prime is 20512487. The next prime is 20512501. The reversal of 20512492 is 29421502.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188134 + ... + 188242.

It is an arithmetic number, because the mean of its divisors is an integer number (517440).

Almost surely, 2^20512492 is an apocalyptic number.

20512492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20512492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24837120).

20512492 is an abundant number, since it is smaller than the sum of its proper divisors (29161748).

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

20512492 is a wasteful number, since it uses less digits than its factorization.

20512492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 189 counting only the distinct ones).

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

The square root of 20512492 is about 4529.0718695998. The cubic root of 20512492 is about 273.7407639204.

Adding to 20512492 its reverse (29421502), we get a palindrome (49933994).

The spelling of 20512492 in words is "twenty million, five hundred twelve thousand, four hundred ninety-two".