20153456 has 40 divisors (see below), whose sum is σ = 40853040. Its totient is φ = 9621504.

The previous prime is 20153443. The next prime is 20153461. The reversal of 20153456 is 65435102.

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, 34640 + ... + 35216.

It is an arithmetic number, because the mean of its divisors is an integer number (1021326).

Almost surely, 2^20153456 is an apocalyptic number.

It is an amenable number.

20153456 is an abundant number, since it is smaller than the sum of its proper divisors (20699584).

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

20153456 is a wasteful number, since it uses less digits than its factorization.

20153456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 20153456 is about 4489.2600726623. The cubic root of 20153456 is about 272.1342330525.

Adding to 20153456 its reverse (65435102), we get a palindrome (85588558).

The spelling of 20153456 in words is "twenty million, one hundred fifty-three thousand, four hundred fifty-six".