21347473844476 has 24 divisors (see below), whose sum is σ = 40245522972480. Its totient is φ = 9849314029632.

The previous prime is 21347473844467. The next prime is 21347473844603. The reversal of 21347473844476 is 67444837474312.

It is a hoax number, since the sum of its digits (64) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69975631 + ... + 70280038.

It is an arithmetic number, because the mean of its divisors is an integer number (1676896790520).

Almost surely, 2^{21347473844476} is an apocalyptic number.

21347473844476 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

21347473844476 is a deficient number, since it is larger than the sum of its proper divisors (18898049128004).

21347473844476 is a wasteful number, since it uses less digits than its factorization.

21347473844476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140258613 (or 140258611 counting only the distinct ones).

The product of its digits is 303464448, while the sum is 64.

The spelling of 21347473844476 in words is "twenty-one trillion, three hundred forty-seven billion, four hundred seventy-three million, eight hundred forty-four thousand, four hundred seventy-six".