21345162178008 has 32 divisors (see below), whose sum is σ = 53363822837760. Its totient is φ = 7114931740320.

The previous prime is 21345162178003. The next prime is 21345162178013. The reversal of 21345162178008 is 80087126154312.

It is an interprime number because it is at equal distance from previous prime (21345162178003) and next prime (21345162178013).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21345162178003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6214360 + ... + 9017127.

It is an arithmetic number, because the mean of its divisors is an integer number (1667619463680).

Almost surely, 2^{21345162178008} is an apocalyptic number.

It is an amenable number.

21345162178008 is an abundant number, since it is smaller than the sum of its proper divisors (32018660659752).

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

21345162178008 is a wasteful number, since it uses less digits than its factorization.

21345162178008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15289887 (or 15289883 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 21345162178008 in words is "twenty-one trillion, three hundred forty-five billion, one hundred sixty-two million, one hundred seventy-eight thousand, eight".