21272627280 has 40 divisors (see below), whose sum is σ = 65945145312. Its totient is φ = 5672700544.

The previous prime is 21272627279. The next prime is 21272627281. The reversal of 21272627280 is 8272627212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21272627279) and next prime (21272627281).

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21272627281) 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, 44317734 + ... + 44318213.

Almost surely, 2^21272627280 is an apocalyptic number.

21272627280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21272627280 is an abundant number, since it is smaller than the sum of its proper divisors (44672518032).

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

21272627280 is a wasteful number, since it uses less digits than its factorization.

21272627280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88635963 (or 88635957 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The spelling of 21272627280 in words is "twenty-one billion, two hundred seventy-two million, six hundred twenty-seven thousand, two hundred eighty".