21010698 has 32 divisors (see below), whose sum is σ = 46840320. Its totient is φ = 6981120.

The previous prime is 21010687. The next prime is 21010699. The reversal of 21010698 is 89601012.

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

It is not an unprimeable number, because it can be changed into a prime (21010699) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32458 + ... + 33098.

It is an arithmetic number, because the mean of its divisors is an integer number (1463760).

Almost surely, 2^21010698 is an apocalyptic number.

21010698 is an abundant number, since it is smaller than the sum of its proper divisors (25829622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21010698 is a wasteful number, since it uses less digits than its factorization.

21010698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1259 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 21010698 is about 4583.7427938313. The cubic root of 21010698 is about 275.9392588450.

The spelling of 21010698 in words is "twenty-one million, ten thousand, six hundred ninety-eight".