21741545946 has 32 divisors (see below), whose sum is σ = 44223062400. Its totient is φ = 7123999680.

The previous prime is 21741545941. The next prime is 21741545951. The reversal of 21741545946 is 64954514712.

It is an interprime number because it is at equal distance from previous prime (21741545941) and next prime (21741545951).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21741545895 and 21741545904.

It is not an unprimeable number, because it can be changed into a prime (21741545941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 608115 + ... + 642873.

It is an arithmetic number, because the mean of its divisors is an integer number (1381970700).

Almost surely, 2^21741545946 is an apocalyptic number.

21741545946 is an abundant number, since it is smaller than the sum of its proper divisors (22481516454).

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

21741545946 is a wasteful number, since it uses less digits than its factorization.

21741545946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36534.

The product of its digits is 1209600, while the sum is 48.

The spelling of 21741545946 in words is "twenty-one billion, seven hundred forty-one million, five hundred forty-five thousand, nine hundred forty-six".