21949070 has 32 divisors (see below), whose sum is σ = 46418400. Its totient is φ = 7367040.

The previous prime is 21949069. The next prime is 21949087. The reversal of 21949070 is 7094912.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6245 + ... + 9104.

It is an arithmetic number, because the mean of its divisors is an integer number (1450575).

Almost surely, 2^21949070 is an apocalyptic number.

21949070 is an abundant number, since it is smaller than the sum of its proper divisors (24469330).

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

21949070 is a wasteful number, since it uses less digits than its factorization.

21949070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15380.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 21949070 is about 4684.9834578150. The cubic root of 21949070 is about 279.9875419627.

The spelling of 21949070 in words is "twenty-one million, nine hundred forty-nine thousand, seventy".