20867934 has 24 divisors (see below), whose sum is σ = 42799320. Its totient is φ = 6783040.

The previous prime is 20867933. The next prime is 20867971. The reversal of 20867934 is 43976802.

It is a junction number, because it is equal to n+sod(n) for n = 20867892 and 20867901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20867933) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9052 + ... + 11120.

It is an arithmetic number, because the mean of its divisors is an integer number (1783305).

Almost surely, 2^20867934 is an apocalyptic number.

20867934 is an abundant number, since it is smaller than the sum of its proper divisors (21931386).

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

20867934 is a wasteful number, since it uses less digits than its factorization.

20867934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156 (or 2115 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 20867934 is about 4568.1433865412. The cubic root of 20867934 is about 275.3128516652.

The spelling of 20867934 in words is "twenty million, eight hundred sixty-seven thousand, nine hundred thirty-four".