20152357 has 4 divisors (see below), whose sum is σ = 20265120. Its totient is φ = 20039596.

The previous prime is 20152351. The next prime is 20152367. The reversal of 20152357 is 75325102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20152357 is a prime.

It is a super-2 number, since 2×20152357² = 812234985310898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20152351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56113 + ... + 56470.

It is an arithmetic number, because the mean of its divisors is an integer number (5066280).

Almost surely, 2^20152357 is an apocalyptic number.

It is an amenable number.

20152357 is a deficient number, since it is larger than the sum of its proper divisors (112763).

20152357 is a wasteful number, since it uses less digits than its factorization.

20152357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112762.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 20152357 is about 4489.1376677487. The cubic root of 20152357 is about 272.1292863251.

Adding to 20152357 its reverse (75325102), we get a palindrome (95477459).

The spelling of 20152357 in words is "twenty million, one hundred fifty-two thousand, three hundred fifty-seven".