20705502 has 8 divisors (see below), whose sum is σ = 41411016. Its totient is φ = 6901832.

The previous prime is 20705491. The next prime is 20705513. The reversal of 20705502 is 20550702.

It is an interprime number because it is at equal distance from previous prime (20705491) and next prime (20705513).

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

20705502 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1725453 + ... + 1725464.

It is an arithmetic number, because the mean of its divisors is an integer number (5176377).

Almost surely, 2^20705502 is an apocalyptic number.

20705502 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20705502 is a wasteful number, since it uses less digits than its factorization.

20705502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450922.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 20705502 is about 4550.3298781517. The cubic root of 20705502 is about 274.5966627166.

The spelling of 20705502 in words is "twenty million, seven hundred five thousand, five hundred two".