20850534 has 80 divisors (see below), whose sum is σ = 50651568. Its totient is φ = 6386688.

The previous prime is 20850523. The next prime is 20850547. The reversal of 20850534 is 43505802.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 20850498 and 20850507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 184462 + ... + 184574.

Almost surely, 2^20850534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20850534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25325784).

20850534 is an abundant number, since it is smaller than the sum of its proper divisors (29801034).

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

20850534 is a wasteful number, since it uses less digits than its factorization.

20850534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 202 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 20850534 is about 4566.2384957424. The cubic root of 20850534 is about 275.2363103765.

The spelling of 20850534 in words is "twenty million, eight hundred fifty thousand, five hundred thirty-four".