21400495674 has 32 divisors (see below), whose sum is σ = 43014732480. Its totient is φ = 7097943552.

The previous prime is 21400495673. The next prime is 21400495681. The reversal of 21400495674 is 47659400412.

It is not an unprimeable number, because it can be changed into a prime (21400495673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1326762 + ... + 1342794.

It is an arithmetic number, because the mean of its divisors is an integer number (1344210390).

Almost surely, 2^21400495674 is an apocalyptic number.

21400495674 is an abundant number, since it is smaller than the sum of its proper divisors (21614236806).

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

21400495674 is a wasteful number, since it uses less digits than its factorization.

21400495674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17134.

The product of its (nonzero) digits is 241920, while the sum is 42.

The spelling of 21400495674 in words is "twenty-one billion, four hundred million, four hundred ninety-five thousand, six hundred seventy-four".