21736701 has 32 divisors (see below), whose sum is σ = 37601280. Its totient is φ = 12151728.

The previous prime is 21736697. The next prime is 21736709. The reversal of 21736701 is 10763712.

It is not a de Polignac number, because 21736701 - 2² = 21736697 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21736709) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7660 + ... + 10106.

It is an arithmetic number, because the mean of its divisors is an integer number (1175040).

Almost surely, 2^21736701 is an apocalyptic number.

21736701 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21736701 is a deficient number, since it is larger than the sum of its proper divisors (15864579).

21736701 is a wasteful number, since it uses less digits than its factorization.

21736701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2510 (or 2504 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 21736701 is about 4662.2635060666. The cubic root of 21736701 is about 279.0816040634.

The spelling of 21736701 in words is "twenty-one million, seven hundred thirty-six thousand, seven hundred one".