20531854 has 16 divisors (see below), whose sum is σ = 35280000. Its totient is φ = 8778744.

The previous prime is 20531839. The next prime is 20531867. The reversal of 20531854 is 45813502.

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, 5517 + ... + 8455.

It is an arithmetic number, because the mean of its divisors is an integer number (2205000).

Almost surely, 2^20531854 is an apocalyptic number.

20531854 is a deficient number, since it is larger than the sum of its proper divisors (14748146).

20531854 is a wasteful number, since it uses less digits than its factorization.

20531854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3447.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 20531854 is about 4531.2088894687. The cubic root of 20531854 is about 273.8268659554.

The spelling of 20531854 in words is "twenty million, five hundred thirty-one thousand, eight hundred fifty-four".