21410545394 has 48 divisors (see below), whose sum is σ = 39209583168. Its totient is φ = 8726100768.

The previous prime is 21410545391. The next prime is 21410545411. The reversal of 21410545394 is 49354501412.

It is a super-2 number, since 2×21410545394² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21410545391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 362489 + ... + 417395.

It is an arithmetic number, because the mean of its divisors is an integer number (816866316).

Almost surely, 2^21410545394 is an apocalyptic number.

21410545394 is a deficient number, since it is larger than the sum of its proper divisors (17799037774).

21410545394 is a wasteful number, since it uses less digits than its factorization.

21410545394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55119 (or 55112 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 21410545394 in words is "twenty-one billion, four hundred ten million, five hundred forty-five thousand, three hundred ninety-four".