20301540 has 48 divisors (see below), whose sum is σ = 64966272. Its totient is φ = 4640256.

The previous prime is 20301539. The next prime is 20301563. The reversal of 20301540 is 4510302.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23749 + ... + 24588.

It is an arithmetic number, because the mean of its divisors is an integer number (1353464).

Almost surely, 2^20301540 is an apocalyptic number.

20301540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20301540 is an abundant number, since it is smaller than the sum of its proper divisors (44664732).

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

20301540 is a wasteful number, since it uses less digits than its factorization.

20301540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48356 (or 48354 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20301540 is about 4505.7230274397. The cubic root of 20301540 is about 272.7991384349.

Adding to 20301540 its reverse (4510302), we get a palindrome (24811842).

It can be divided in two parts, 2030 and 1540, that added together give a triangular number (3570 = T₈₄).

The spelling of 20301540 in words is "twenty million, three hundred one thousand, five hundred forty".