20152445 has 8 divisors (see below), whose sum is σ = 25455840. Its totient is φ = 15273360.

The previous prime is 20152441. The next prime is 20152459. The reversal of 20152445 is 54425102.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20152445 - 2² = 20152441 is a prime.

It is a super-2 number, since 2×20152445² = 812242078956050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20152445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105971 + ... + 106160.

It is an arithmetic number, because the mean of its divisors is an integer number (3181980).

Almost surely, 2^20152445 is an apocalyptic number.

It is an amenable number.

20152445 is a deficient number, since it is larger than the sum of its proper divisors (5303395).

20152445 is a wasteful number, since it uses less digits than its factorization.

20152445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212155.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 20152445 is about 4489.1474691750. The cubic root of 20152445 is about 272.1296824300.

Adding to 20152445 its reverse (54425102), we get a palindrome (74577547).

The spelling of 20152445 in words is "twenty million, one hundred fifty-two thousand, four hundred forty-five".