20540079 has 24 divisors (see below), whose sum is σ = 34344960. Its totient is φ = 11585808.

The previous prime is 20540059. The next prime is 20540099. The reversal of 20540079 is 97004502.

It is an interprime number because it is at equal distance from previous prime (20540059) and next prime (20540099).

It is not a de Polignac number, because 20540079 - 2⁸ = 20539823 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20540059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2914 + ... + 7040.

It is an arithmetic number, because the mean of its divisors is an integer number (1431040).

Almost surely, 2^20540079 is an apocalyptic number.

20540079 is a deficient number, since it is larger than the sum of its proper divisors (13804881).

20540079 is a wasteful number, since it uses less digits than its factorization.

20540079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4219 (or 4216 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 20540079 is about 4532.1163930332. The cubic root of 20540079 is about 273.8634258182.

The spelling of 20540079 in words is "twenty million, five hundred forty thousand, seventy-nine".