21862363 has 2 divisors, whose sum is σ = 21862364. Its totient is φ = 21862362.

The previous prime is 21862333. The next prime is 21862387. The reversal of 21862363 is 36326812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21862363 - 2¹³ = 21854171 is a prime.

It is not a weakly prime, because it can be changed into another prime (21862303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10931181 + 10931182.

It is an arithmetic number, because the mean of its divisors is an integer number (10931182).

Almost surely, 2^21862363 is an apocalyptic number.

21862363 is a deficient number, since it is larger than the sum of its proper divisors (1).

21862363 is an equidigital number, since it uses as much as digits as its factorization.

21862363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 31.

The square root of 21862363 is about 4675.7205861771. The cubic root of 21862363 is about 279.6183703955.

The spelling of 21862363 in words is "twenty-one million, eight hundred sixty-two thousand, three hundred sixty-three".