21362061 has 32 divisors (see below), whose sum is σ = 35215360. Its totient is φ = 11244096.

The previous prime is 21362057. The next prime is 21362113. The reversal of 21362061 is 16026312.

It is a happy number.

It is not a de Polignac number, because 21362061 - 2² = 21362057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21362041) 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, 14040 + ... + 15486.

It is an arithmetic number, because the mean of its divisors is an integer number (1100480).

Almost surely, 2^21362061 is an apocalyptic number.

21362061 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21362061 is a deficient number, since it is larger than the sum of its proper divisors (13853299).

21362061 is a wasteful number, since it uses less digits than its factorization.

21362061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1513.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 21362061 is about 4621.9109684199. The cubic root of 21362061 is about 277.4689454738.

Adding to 21362061 its reverse (16026312), we get a palindrome (37388373).

The spelling of 21362061 in words is "twenty-one million, three hundred sixty-two thousand, sixty-one".