21620094 has 16 divisors (see below), whose sum is σ = 44160768. Its totient is φ = 7053272.

The previous prime is 21620087. The next prime is 21620101. The reversal of 21620094 is 49002612.

It is an interprime number because it is at equal distance from previous prime (21620087) and next prime (21620101).

It is a congruent number.

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, 38052 + ... + 38615.

It is an arithmetic number, because the mean of its divisors is an integer number (2760048).

Almost surely, 2^21620094 is an apocalyptic number.

21620094 is an abundant number, since it is smaller than the sum of its proper divisors (22540674).

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

21620094 is a wasteful number, since it uses less digits than its factorization.

21620094 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76719.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 21620094 is about 4649.7412831253. The cubic root of 21620094 is about 278.5816625901.

The spelling of 21620094 in words is "twenty-one million, six hundred twenty thousand, ninety-four".