21536995 has 8 divisors (see below), whose sum is σ = 26735760. Its totient is φ = 16635360.

The previous prime is 21536989. The next prime is 21537001. The reversal of 21536995 is 59963512.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21536989) and next prime (21537001).

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

It is not a de Polignac number, because 21536995 - 2¹³ = 21528803 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74121 + ... + 74410.

It is an arithmetic number, because the mean of its divisors is an integer number (3341970).

Almost surely, 2^21536995 is an apocalyptic number.

21536995 is a deficient number, since it is larger than the sum of its proper divisors (5198765).

21536995 is a wasteful number, since it uses less digits than its factorization.

21536995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148565.

The product of its digits is 72900, while the sum is 40.

The square root of 21536995 is about 4640.7968065840. The cubic root of 21536995 is about 278.2242854718.

The spelling of 21536995 in words is "twenty-one million, five hundred thirty-six thousand, nine hundred ninety-five".