20902358 has 4 divisors (see below), whose sum is σ = 31353540. Its totient is φ = 10451178.

The previous prime is 20902313. The next prime is 20902381. The reversal of 20902358 is 85320902.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 85320902 = 2 ⋅42660451.

It is a self number, because there is not a number n which added to its sum of digits gives 20902358.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5225588 + ... + 5225591.

It is an arithmetic number, because the mean of its divisors is an integer number (7838385).

Almost surely, 2^20902358 is an apocalyptic number.

20902358 is a deficient number, since it is larger than the sum of its proper divisors (10451182).

20902358 is a wasteful number, since it uses less digits than its factorization.

20902358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10451181.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 20902358 is about 4571.9096666492. The cubic root of 20902358 is about 275.4641549846.

The spelling of 20902358 in words is "twenty million, nine hundred two thousand, three hundred fifty-eight".