21548154000 has 80 divisors (see below), whose sum is σ = 69471267840. Its totient is φ = 5746172800.

The previous prime is 21548153947. The next prime is 21548154029. The reversal of 21548154000 is 45184512.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789680 + ... + 1801679.

It is an arithmetic number, because the mean of its divisors is an integer number (868390848).

Almost surely, 2^21548154000 is an apocalyptic number.

21548154000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21548154000 is an abundant number, since it is smaller than the sum of its proper divisors (47923113840).

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

21548154000 is a wasteful number, since it uses less digits than its factorization.

21548154000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3591385 (or 3591369 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The spelling of 21548154000 in words is "twenty-one billion, five hundred forty-eight million, one hundred fifty-four thousand".