20958542 has 32 divisors (see below), whose sum is σ = 35942400. Its totient is φ = 9079200.

The previous prime is 20958541. The next prime is 20958557. The reversal of 20958542 is 24585902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20958541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53684 + ... + 54072.

It is an arithmetic number, because the mean of its divisors is an integer number (1123200).

Almost surely, 2^20958542 is an apocalyptic number.

20958542 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20958542 is a deficient number, since it is larger than the sum of its proper divisors (14983858).

20958542 is a wasteful number, since it uses less digits than its factorization.

20958542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 20958542 is about 4578.0500215703. The cubic root of 20958542 is about 275.7107433046.

The spelling of 20958542 in words is "twenty million, nine hundred fifty-eight thousand, five hundred forty-two".