20770590 has 16 divisors (see below), whose sum is σ = 49849488. Its totient is φ = 5538816.

The previous prime is 20770573. The next prime is 20770609. The reversal of 20770590 is 9507702.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 692353 = 20770590 / (2 + 0 + 7 + 7 + 0 + 5 + 9 + 0).

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, 346147 + ... + 346206.

It is an arithmetic number, because the mean of its divisors is an integer number (3115593).

Almost surely, 2^20770590 is an apocalyptic number.

20770590 is an abundant number, since it is smaller than the sum of its proper divisors (29078898).

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

20770590 is a wasteful number, since it uses less digits than its factorization.

20770590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692363.

The product of its (nonzero) digits is 4410, while the sum is 30.

The square root of 20770590 is about 4557.4762753085. The cubic root of 20770590 is about 274.8840944063.

The spelling of 20770590 in words is "twenty million, seven hundred seventy thousand, five hundred ninety".