20106534 has 16 divisors (see below), whose sum is σ = 45957888. Its totient is φ = 5744712.

The previous prime is 20106521. The next prime is 20106589. The reversal of 20106534 is 43560102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 20106534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239322 + ... + 239405.

It is an arithmetic number, because the mean of its divisors is an integer number (2872368).

Almost surely, 2^20106534 is an apocalyptic number.

20106534 is an abundant number, since it is smaller than the sum of its proper divisors (25851354).

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

20106534 is a wasteful number, since it uses less digits than its factorization.

20106534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478739.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 20106534 is about 4484.0309990008. The cubic root of 20106534 is about 271.9228713696.

Adding to 20106534 its reverse (43560102), we get a palindrome (63666636).

The spelling of 20106534 in words is "twenty million, one hundred six thousand, five hundred thirty-four".