20854883461 has 4 divisors (see below), whose sum is σ = 20992995424. Its totient is φ = 20716771500.

The previous prime is 20854883453. The next prime is 20854883479. The reversal of 20854883461 is 16438845802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20854883461 - 2³ = 20854883453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20854883411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69055755 + ... + 69056056.

It is an arithmetic number, because the mean of its divisors is an integer number (5248248856).

Almost surely, 2^20854883461 is an apocalyptic number.

It is an amenable number.

20854883461 is a deficient number, since it is larger than the sum of its proper divisors (138111963).

20854883461 is a wasteful number, since it uses less digits than its factorization.

20854883461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138111962.

The product of its (nonzero) digits is 1474560, while the sum is 49.

The spelling of 20854883461 in words is "twenty billion, eight hundred fifty-four million, eight hundred eighty-three thousand, four hundred sixty-one".