20531454 has 16 divisors (see below), whose sum is σ = 41150592. Its totient is φ = 6829208.

The previous prime is 20531437. The next prime is 20531477. The reversal of 20531454 is 45413502.

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, 384 + ... + 6419.

It is an arithmetic number, because the mean of its divisors is an integer number (2571912).

Almost surely, 2^20531454 is an apocalyptic number.

20531454 is an abundant number, since it is smaller than the sum of its proper divisors (20619138).

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

20531454 is a wasteful number, since it uses less digits than its factorization.

20531454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7311.

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 20531454 is about 4531.1647509222. The cubic root of 20531454 is about 273.8250877193.

Adding to 20531454 its reverse (45413502), we get a palindrome (65944956).

The spelling of 20531454 in words is "twenty million, five hundred thirty-one thousand, four hundred fifty-four".