20701390 has 16 divisors (see below), whose sum is σ = 37354608. Its totient is φ = 8260096.

The previous prime is 20701379. The next prime is 20701423. The reversal of 20701390 is 9310702.

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, 2094 + ... + 6766.

It is an arithmetic number, because the mean of its divisors is an integer number (2334663).

Almost surely, 2^20701390 is an apocalyptic number.

20701390 is a deficient number, since it is larger than the sum of its proper divisors (16653218).

20701390 is a wasteful number, since it uses less digits than its factorization.

20701390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5123.

The product of its (nonzero) digits is 378, while the sum is 22.

The square root of 20701390 is about 4549.8780203430. The cubic root of 20701390 is about 274.5784837122.

The spelling of 20701390 in words is "twenty million, seven hundred one thousand, three hundred ninety".