20740535 has 8 divisors (see below), whose sum is σ = 25561536. Its totient is φ = 16143840.

The previous prime is 20740513. The next prime is 20740553. The reversal of 20740535 is 53504702.

20740535 = T₃₇₈ + T₃₇₉ + ... + T₅₆₂.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-20740535 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55871 + ... + 56240.

It is an arithmetic number, because the mean of its divisors is an integer number (3195192).

Almost surely, 2^20740535 is an apocalyptic number.

20740535 is a deficient number, since it is larger than the sum of its proper divisors (4821001).

20740535 is a wasteful number, since it uses less digits than its factorization.

20740535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112153.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 20740535 is about 4554.1777523500. The cubic root of 20740535 is about 274.7514448358.

The spelling of 20740535 in words is "twenty million, seven hundred forty thousand, five hundred thirty-five".