20958040 has 32 divisors (see below), whose sum is σ = 47286000. Its totient is φ = 8360064.

The previous prime is 20958029. The next prime is 20958043. The reversal of 20958040 is 4085902.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20958043) 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, 27991 + ... + 28729.

Almost surely, 2^20958040 is an apocalyptic number.

20958040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20958040 is an abundant number, since it is smaller than the sum of its proper divisors (26327960).

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

20958040 is a wasteful number, since it uses less digits than its factorization.

20958040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459 (or 1455 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 20958040 is about 4577.9951944055. The cubic root of 20958040 is about 275.7085420080.

The spelling of 20958040 in words is "twenty million, nine hundred fifty-eight thousand, forty".