21769847025 has 24 divisors (see below), whose sum is σ = 36006341280. Its totient is φ = 11606221440.

The previous prime is 21769847023. The next prime is 21769847027. The reversal of 21769847025 is 52074896712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21769847023) and next prime (21769847027).

It is not a de Polignac number, because 21769847025 - 2¹ = 21769847023 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21769847023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151494 + ... + 257856.

It is an arithmetic number, because the mean of its divisors is an integer number (1500264220).

Almost surely, 2^21769847025 is an apocalyptic number.

21769847025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

21769847025 is a deficient number, since it is larger than the sum of its proper divisors (14236494255).

21769847025 is a wasteful number, since it uses less digits than its factorization.

21769847025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109105 (or 109100 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The spelling of 21769847025 in words is "twenty-one billion, seven hundred sixty-nine million, eight hundred forty-seven thousand, twenty-five".