20357541 has 8 divisors (see below), whose sum is σ = 30159360. Its totient is φ = 13571676.

The previous prime is 20357539. The next prime is 20357543. The reversal of 20357541 is 14575302.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20357539) and next prime (20357543).

It is not a de Polignac number, because 20357541 - 2¹ = 20357539 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 753983 = 20357541 / (2 + 0 + 3 + 5 + 7 + 5 + 4 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20357543) 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, 376965 + ... + 377018.

It is an arithmetic number, because the mean of its divisors is an integer number (3769920).

Almost surely, 2^20357541 is an apocalyptic number.

It is an amenable number.

20357541 is a deficient number, since it is larger than the sum of its proper divisors (9801819).

20357541 is an equidigital number, since it uses as much as digits as its factorization.

20357541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753992 (or 753986 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 20357541 is about 4511.9331776967. The cubic root of 20357541 is about 273.0497433811.

The spelling of 20357541 in words is "twenty million, three hundred fifty-seven thousand, five hundred forty-one".