21377227503 has 8 divisors (see below), whose sum is σ = 30003126400. Its totient is φ = 13501406808.

The previous prime is 21377227483. The next prime is 21377227523. The reversal of 21377227503 is 30572277312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21377227483) and next prime (21377227523).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21377227503 - 2⁸ = 21377227247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21377227523) 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, 187519483 + ... + 187519596.

It is an arithmetic number, because the mean of its divisors is an integer number (3750390800).

Almost surely, 2^21377227503 is an apocalyptic number.

21377227503 is a deficient number, since it is larger than the sum of its proper divisors (8625898897).

21377227503 is a wasteful number, since it uses less digits than its factorization.

21377227503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375039101.

The product of its (nonzero) digits is 123480, while the sum is 39.

The spelling of 21377227503 in words is "twenty-one billion, three hundred seventy-seven million, two hundred twenty-seven thousand, five hundred three".