20002758 has 16 divisors (see below), whose sum is σ = 40419120. Its totient is φ = 6598656.

The previous prime is 20002757. The next prime is 20002771. The reversal of 20002758 is 85720002.

It is a super-2 number, since 2×20002758² = 800220655213128, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16603 + ... + 17766.

It is an arithmetic number, because the mean of its divisors is an integer number (2526195).

Almost surely, 2^20002758 is an apocalyptic number.

20002758 is an abundant number, since it is smaller than the sum of its proper divisors (20416362).

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

20002758 is a wasteful number, since it uses less digits than its factorization.

20002758 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34471.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 20002758 is about 4472.4442981439. Note that the first 3 decimals coincide. The cubic root of 20002758 is about 271.4542383590.

The spelling of 20002758 in words is "twenty million, two thousand, seven hundred fifty-eight".