20454836 has 6 divisors (see below), whose sum is σ = 35795970. Its totient is φ = 10227416.

The previous prime is 20454817. The next prime is 20454839. The reversal of 20454836 is 63845402.

It can be written as a sum of positive squares in only one way, i.e., 18438436 + 2016400 = 4294^2 + 1420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2556851 + ... + 2556858.

It is an arithmetic number, because the mean of its divisors is an integer number (5965995).

Almost surely, 2^20454836 is an apocalyptic number.

It is an amenable number.

20454836 is a deficient number, since it is larger than the sum of its proper divisors (15341134).

20454836 is a wasteful number, since it uses less digits than its factorization.

20454836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5113713 (or 5113711 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 20454836 is about 4522.7022895610. The cubic root of 20454836 is about 273.4840486805.

The spelling of 20454836 in words is "twenty million, four hundred fifty-four thousand, eight hundred thirty-six".