20535392 has 48 divisors (see below), whose sum is σ = 42319872. Its totient is φ = 9797760.

The previous prime is 20535379. The next prime is 20535413. The reversal of 20535392 is 29353502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125903 + ... + 126065.

It is an arithmetic number, because the mean of its divisors is an integer number (881664).

Almost surely, 2^20535392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20535392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21159936).

20535392 is an abundant number, since it is smaller than the sum of its proper divisors (21784480).

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

20535392 is a wasteful number, since it uses less digits than its factorization.

20535392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 323 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 29.

The square root of 20535392 is about 4531.5992761938. The cubic root of 20535392 is about 273.8425934491.

Adding to 20535392 its reverse (29353502), we get a palindrome (49888894).

The spelling of 20535392 in words is "twenty million, five hundred thirty-five thousand, three hundred ninety-two".